Tajima VARIX Chisel Knife is a professional hand tool made for electricians and construction users who need one tool that can split cable cleanly, deburr rough edges, and take some striking force without folding up on the job. This is a chisel knife designed for cable splitting, deburring, and light chisel-style work. Model Number: DK-TN80.

The main reason this knife stands out is the hollow-ground blade. On THWN, THHN, and NM cable, that blade geometry is built to split material smoothly instead of binding and dragging. If you spend time opening jacketed wire or cleaning up insulation without nicking what matters, that design is the whole point. Tajima also adds a deburring groove on the blade, so you can clean up rough cut surfaces without reaching for another tool.

This is not just a utility knife with a fancy shape. The blade has a chisel-like tip for added versatility, which gives you more control when scoring, scraping, or doing detail work where a standard straight knife is not the best fit. Tajima pairs that with a steel blade and hard chrome plating for durability and edge protection in real jobsite conditions.

The full-tang construction matters because it changes how the tool feels under load. When a knife is meant to be tapped or used like a light-duty chisel, you want the blade and handle working as one piece. Tajima built the DK-TN80 with a hammer-ready full-tang blade and an end cap designed to prevent metal-to-metal contact. In plain terms, it is made to take jobsite abuse better than a basic electrician's knife.

Day-to-day usability is solid too. The non-slip elastomer grip helps keep the handle planted in your hand when conditions are dusty or when you're working with gloves. There is also a safety rope mounting hole, which is a small detail that makes sense for ladder work, overhead work, or any situation where dropping a hand tool is a problem. A blade protector is included, which makes storage and transport safer and helps protect the edge between uses.

This Tajima chisel knife makes the most sense for electricians, maintenance techs, and construction pros who want a fixed-blade hand tool that can handle cable work and small prying or striking tasks without switching tools constantly. If your work is mostly precision cable prep and general jobsite utility, this is a more purpose-built option than a standard pocket knife. If you want a folding knife or a tool meant for heavy demolition, this is not that. It is a specialized electrician's chisel knife built for controlled cutting, clean edge prep, and hard everyday use.

Why the Tajima VARIX Chisel Knife earns a spot in an electrician's pouch

This is a smart pick for guys who want a fixed-blade electrician's knife that cuts clean, deburrs fast, and can take a few hammer taps without feeling delicate.

• Who it's for: Electricians, maintenance pros, and construction users who work with cable regularly and want one hand tool that covers cutting, edge cleanup, and light chisel-style tasks.
• Why it stands out: The hollow-ground blade is purpose-built for cable splitting, and the full-tang hammer-ready construction gives it more usefulness than a standard jobsite knife.
• Worth knowing: This is a specialized fixed-blade tool, not a folding pocket knife. If that is what you want, great. If you need compact carry above all else, look elsewhere.

• What is this knife designed to cut? It is designed for smooth, precise splitting of THWN, THHN, and NM cables.
• Can it be used like a chisel? Yes. It has a chisel-like blade tip and a hammer-ready full-tang blade for added versatility.
• Does it help clean up rough cut edges? Yes. The blade includes a deburring groove for cut surfaces.
• Where is it made? Source data lists Japan as the country of origin.