Best Wire Cutters by Job: Diagonal Cutters for Copper, Piano Wire, Electrical Cable and Electronics
Quick answer: the best wire cutters are the ones rated for what you cut
- Everyday copper wire and zip ties: a 150 mm-class diagonal cutter such as the FUJIYA 60S-150 (copper φ2.6 mm, spring) or the heavy-duty KEIBA N-206S (spring, stripping hole).
- Steel and piano wire: a cutter that lists a piano wire capacity, such as the KEIBA ET-226 (piano wire φ1.8 mm), FUJIYA 70H-150 or TTC PKN-160 (piano wire φ1.0 mm).
- Electrical cable: a thin-blade electrician's cutter such as the TTC PUN-160 (copper φ4.0 mm) or KEIBA NH-218 (VVF 3-core 2.6 mm in one cut).
- Small electronics: a mini cutter such as the TTC MN-115 (65 g) or the ENGINEER NS-04 (ESD model).
- The rule: stay inside the cutting capacity printed for each material. Wikipedia notes that lower-quality cutters are generally not suitable for tempered steel such as piano wire; the jaws can dent or chip.
"Wire cutters", "diagonal cutters", "side cutters" and "dikes" usually mean the same tool: pliers with two angled blades that cut by indenting and wedging the wire apart rather than shearing it (Wikipedia). This guide explains how to choose one by material, wire size, blade type and length, then compares 13 diagonal cutters from four Japanese brands using the cutting capacities on their product pages. Sources are listed at the end.
Why look at Japanese wire cutters?
We sell Japanese tools, so this guide covers Japanese brands only (TTC/Tsunoda, FUJIYA, KEIBA and ENGINEER). Here is what their product pages show, rather than general claims about quality:
- Capacity by material. Most product pages list a separate maximum for copper wire, soft iron wire and, on hard-wire models, piano wire or stainless steel. That makes it easier to match the cutter to the job.
- Separate models per job. Across these four brands, standard, heavy-duty, thin-blade electrician's, hard-wire and mini cutters are sold as separate models.
- A Japanese standard. The FUJIYA 70H-150 product page lists the Japanese Industrial Standard JIS B 4635.
- Country of origin, where stated. The TTC, FUJIYA and ENGINEER product pages in this guide list Japan. The KEIBA pages name the maker in Sanjo, Japan but do not state a country of origin, so it is Not confirmed.
What we do not claim: that these cutters last longer or cut better than American or European brands. We have not found a test that compares them, so choose by capacity and size.
Step 1: what are you cutting?
| Material | What to look for | Examples in this guide |
|---|---|---|
| Copper wire, cords, zip ties | A standard cutter with a copper wire capacity at least as large as your wire | FUJIYA 60S-150, KEIBA N-206S |
| Soft iron wire (tie wire) | A soft iron or iron wire capacity on the product page | TTC PKN-160 (φ3.2 mm), TTC PUN-225ATG (φ3.2 mm) |
| Piano wire and other hard steel wire | A stated piano wire capacity. Wikipedia notes that cutting tempered steel with a cutter not made for it can dent or chip the jaws | KEIBA ET-226 (φ1.8 mm), FUJIYA 70H-150 and TTC PKN-160 (φ1.0 mm) |
| Multi-core electrical cable | A thin-blade electrician's cutter with a cable capacity listed | TTC PUN-160, KEIBA NH-218, TTC PUN-225ATG |
| Fine leads on circuit boards | A mini cutter; for a cut flush to the board, see our flush cutter guide | TTC MN-115, ENGINEER NS-04 |
For thick power cable or wire rope, a diagonal cutter is the wrong tool; see our cable cutter guide.
Step 2: match the wire size (mm vs AWG)
Japanese product pages state cutting capacity as a solid wire diameter in mm (φ). If you work in AWG, Engineering ToolBox lists these diameters: 14 AWG 1.63 mm, 12 AWG 2.05 mm, 10 AWG 2.59 mm and 8 AWG 3.26 mm. So a cutter rated for copper φ2.6 mm covers solid copper up to about 10 AWG by diameter. Stranded wire and cable with insulation are a different case; check the cable capacity where the page lists one.
About VVF cable: several electrician's cutters list a capacity for VVF (a Japanese cable type), such as "2.0 × 3 cores". Whether a given cable used in your country fits the same way is Not confirmed; use the copper wire diameter as the safer guide.
Step 3: blade type, length and spring
- Blade thickness. Product pages describe thick or heavy-duty blades (FUJIYA 60S-150, 70H-150, TTC PKN-160) for tougher wire, and thin blades (TTC PUN series, KEIBA NH-218) for electrical work. KEIBA notes that the NH-218 is not rated for hard wire.
- Cut face. Standard diagonal cutters leave a pointed, V-shaped end; flush cutters are ground flat on one side so the cut sits flush (Wikipedia). The TTC MN-115 and ENGINEER NS-04 are listed as semi-flush. For full flush cutters, see our flush cutter guide.
- Length and leverage. BobVila notes that a longer handle gives more leverage but is harder to use in tight spaces, and that a pivot closer to the jaws gives more cutting force. In this guide, cutters run from 117 mm (TTC MN-115) to 230 mm (TTC PUN-225ATG).
- Spring. A spring reopens the jaws when you relax your grip, which allows one-handed use and reduces the effort needed to reopen the jaws (BobVila). Spring-loaded models here: FUJIYA 60S-150 and 460S-150, KEIBA N-206S and NH-218, TTC MN-115, ENGINEER NS-04.
- Insulation. Grips can give some protection against shock (Wikipedia), but none of the product pages in this guide state a 1,000 V insulated rating. Do not use these cutters on live circuits.
The 13 wire cutters compared
Capacities and weights are copied from each product page. "Copper" and "Soft iron" are solid wire diameters.
FUJIYA 60S-150 Diagonal Cutting Nippers with Spring, 150 mm
KEIBA N-206S Heavy Duty Diagonal Cutting Nippers with Spring, 150 mm
| Model | Type | Copper | Soft iron | Hard wire | Length | Weight | Spring |
|---|---|---|---|---|---|---|---|
| FUJIYA 60S-150 | Standard, thick blade | φ2.6 mm | φ1.6 mm (iron) | Not confirmed | 152 mm | 120 g | Yes |
| KEIBA N-206S | Heavy duty, stripping hole | Soft wire 2.3 mm | Hard wire 1.8 mm | 163 mm | 165 g | Yes | |
| KEIBA PU-266R | Power-up | Soft wire 2.3 mm | Hard wire 1.8 mm | 165 mm (nominal) | 160 g | No | |
| TTC PKN-160 | Heavy duty | φ4.0 mm | φ3.2 mm | Piano φ1.0, stainless φ1.6 mm | 167 mm | 170 g | Not confirmed |
| FUJIYA 70H-150 | High strength, thick blade | φ3.0 mm | φ2.0 mm (iron) | Piano φ1.0 mm | 156 mm | 190 g | Not confirmed |
| KEIBA ET-226 | Hard wire, long neck | Soft wire φ2.3, stranded φ2.3 mm | Piano φ1.8 mm | 173 mm | 180 g | Not confirmed | |
| FUJIYA 460S-150 | Carbide-tipped blade | φ2.6 mm | φ1.6 mm (iron) | Piano φ0.5 mm | 149 mm | 120 g | Yes |
| TTC PUN-160 | Electrician's, thin blade | φ4.0 mm | φ2.0 mm | Not confirmed | 167 mm | 169 g | Not confirmed |
| KEIBA NH-218 | Electrician's, thin blade | φ3.5 mm | φ2.5 mm | Not rated for hard wire | 203 mm | 305 g | Yes |
| TTC PUN-225ATG | Electrician's, thin blade, simple crimper | φ5.0 mm | φ3.2 mm | Not confirmed | 230 mm | 343 g | Not confirmed |
| TTC SN-125DG | Stainless steel body | φ2.0 mm | φ1.2 mm | Not confirmed | 138 mm | 100 g | Not confirmed |
| TTC MN-115 | Mini, semi-flush | φ2.0 mm | φ1.2 mm | Not confirmed | 117 mm | 65 g | Yes |
| ENGINEER NS-04 | Micro, semi-flush, ESD | φ2.6 mm | φ1.6 mm | Not confirmed | 120 mm | 67 g | Yes |
KEIBA lists "soft wire" and "hard wire" capacities rather than copper and iron separately for the N-206S and PU-266R, so those cells are merged. "Not confirmed" means the product page does not state the value.
Best wire cutters by job
Everyday general-purpose cutting
- FUJIYA 60S-150: FUJIYA's standard model, with a round, thick blade, a spring and a resin grip. Copper φ2.6 mm, iron wire φ1.6 mm, 120 g.
- KEIBA N-206S: a coil spring for easy opening and a hole in the blade face for stripping vinyl cord, according to its product page. Soft wire 2.3 mm, hard wire 1.8 mm.
- KEIBA PU-266R: KEIBA states about twice the power of its standard nippers, aimed at users with less grip strength. No spring.
Steel and piano wire
- KEIBA ET-226: KEIBA rates the ET series for hard steel wire including piano wire (SWP-B); the ET-226 lists piano wire φ1.8 mm, the largest piano wire capacity among the 13 cutters compared. KEIBA also makes the ET-225 (145 mm, piano wire φ1.6 mm) and the ET-227 (200 mm, piano wire φ2.0 mm).
- TTC PKN-160: the most material types listed here: soft copper φ4.0, soft iron φ3.2, stainless φ1.6 and piano wire φ1.0 mm.
- FUJIYA 70H-150: a thick-blade, high-strength cutter listing JIS B 4635, piano wire φ1.0 mm and copper φ3.0 mm. Its product page also lists it as safety cord compliant.
- FUJIYA 460S-150: a carbide tip is inserted into the blade, according to its product page. Its piano wire capacity is smaller (φ0.5 mm), so treat it as a standard cutter with a harder edge, not a heavy hard-wire cutter.
Electrical work
- TTC PUN-160: a thin, round blade for electricians, soft copper φ4.0 mm and VVF 2.0 × 3 cores, at 167 mm.
- KEIBA NH-218: KEIBA says the long blade cuts 3-core VVF cable in one go (2.6 mm listed). It has a spring and is not rated for hard wire.
- TTC PUN-225ATG: the largest copper capacity here (φ5.0 mm), VVF 2.6 × 3 cores and a simple crimping function. At 230 mm and 343 g it is the longest and heaviest.
For cable insulation, pair the cutter with a stripper; see our wire stripper guide.
Electronics and fine work
- TTC MN-115: a 117 mm, 65 g mini cutter with a semi-flush blade and a spring; copper φ2.0 mm.
- ENGINEER NS-04: a semi-flush ESD micro cutter with a listed surface resistance of 1 × 10⁶ to 10⁷ Ω; copper φ2.6 mm.
Wet or corrosive environments
The TTC SN-125DG has a stainless steel body (SUS402J2), with copper φ2.0 mm and soft iron φ1.2 mm. Corrosion performance compared with other cutters is Not confirmed.
How to use wire cutters without damaging them
- Stay within capacity. Check the capacity for the material, not just the wire size. A cutter rated φ2.6 mm for copper may list only φ1.6 mm for iron wire (FUJIYA 60S-150).
- Do not cut hard wire with a soft-wire cutter. Wikipedia warns that jaws not hard enough for tempered steel can dent or have a piece chipped out, ruining the tool.
- Never cut live wires. None of the product pages here state a 1,000 V insulation rating.
- Wear eye protection when cutting hard or springy wire, since the cut end can fly. This is general workshop practice rather than a statement from the sources above.
FAQ
What is the difference between wire cutters, diagonal cutters and side cutters?
In everyday use they are the same tool. Wikipedia lists wire cutters, diagonal cutting pliers and side cutters as names for diagonal pliers, along with "dikes" in the US electrical trade and "nippers" in British English.
Can wire cutters cut piano wire?
Only if the product page lists a piano wire capacity. In this guide that means the KEIBA ET-226 (φ1.8 mm), FUJIYA 70H-150 and TTC PKN-160 (φ1.0 mm), and FUJIYA 460S-150 (φ0.5 mm).
What size wire cutters should I buy?
For general work, 150–165 mm is a common middle size in this guide. Go smaller (about 115–125 mm) for electronics and tight spaces, and longer (200 mm and up) for more leverage on cable, as BobVila notes longer handles give more leverage.
Are these wire cutters insulated for electrical work?
No 1,000 V insulation rating is stated on the product pages in this guide. Do not rely on the grips for shock protection; de-energize circuits before cutting.
Do these cutters work with AWG wire?
Yes, by diameter. Capacities are given in mm; Engineering ToolBox lists 12 AWG at 2.05 mm and 10 AWG at 2.59 mm, so a φ2.6 mm copper rating covers solid copper up to about 10 AWG.
Related guides
- Best Flush Cutters by Job: Electronics, Plastic Models, 3D Prints and Zip Ties
- Best Cable Cutter for Your Cable Size
- TSUNODA Electrician Wire Cutters & Nippers: A Buyer's Guide by Use Case
- KEIBA Nippers & Pliers: Pick the Right Cutter for Every Job
- FUJIYA Pliers Buyer's Guide
- Japanese Electrician Tools: 8 Brands to Know
- Japanese nippers and wire cutters
Find your wire cutters
Browse standard, heavy-duty, hard-wire, electrician's and mini cutters from TTC, FUJIYA, KEIBA and ENGINEER.
Shop wire cuttersSources
- Wikipedia, Diagonal pliers
- BobVila, The Best Wire Cutters
- Engineering ToolBox, AWG wire gauge
- Product specifications: each linked product page in our store (TTC, FUJIYA, KEIBA, ENGINEER).
Last reviewed: October 2026.
