Cle-Line
Cle-Line C21160 15-piece 135° mechanics length drill bit set
15-piece high-speed steel drill bit set with 135° split points and black oxide finish for heavy-duty mechanics use
- TypeDrill Bits
- 15-piece set covers common drilling tasks
- 135° split point starts holes cleanly without wandering
- High-speed steel resists wear in metal and wood
- Black oxide finish reduces friction and corrosion
- Mechanics length offers extra reach in tight spaces
15-piece mechanics length drill bit set
The Cle-Line C21160 provides a 15-piece assortment of mechanics length drill bits designed for general-purpose drilling tasks. The bits feature a 135-degree split point that reduces walking and allows for easier penetration on contact. They are constructed from high-speed steel with a black oxide finish to resist corrosion and extend tool life. This set suits technicians and tradespeople who need a range of sizes in a single package.
135-degree split point and high-speed steel
The 135-degree split point geometry centres the bit quickly without a centre punch, lowering the thrust required during normal use. High-speed steel construction maintains hardness at the elevated temperatures generated when drilling steel and other hard materials. The black oxide surface treatment helps retain cutting lubricant and reduces friction during operation. Right-hand cutting direction matches standard drill chucks and driving tools.
Black oxide finish and right-hand cutting
The black oxide coating provides a layer of corrosion resistance that protects the bits during storage and transport. Right-hand cutting orientation ensures compatibility with all common drill motors and impact drivers without the need for reverse-specific tooling. Mechanics length proportions offer a balance of rigidity and reach for work in confined spaces. The 15-piece count covers a spread of diameters for everyday maintenance and fabrication jobs.
Highlights
- 15-piece set covers common drilling tasks
- 135° split point starts holes cleanly without wandering
- High-speed steel resists wear in metal and wood
- Black oxide finish reduces friction and corrosion
- Mechanics length offers extra reach in tight spaces
Specifications
| Brand | CLE-LINE |
|---|---|
| Type | Drill Bits |
Questions about this item
How do I install the 135-degree split-point bits in a drill chuck, and what step is often missed?
Open the chuck jaws fully, insert the bit shank until it seats against the chuck body, then tighten securely; the step often missed is verifying the bit runs true before drilling.
What maintenance or replacement will the 15-piece high-speed steel set need over time?
The black-oxide finish resists corrosion, but bits dull with use; sharpen or replace individual bits when cutting performance drops, especially on harder materials.
What limit appears first when using these right-hand cutting bits continuously?
Heat buildup at the 135-degree split point reduces edge life fastest during sustained drilling; use cutting fluid and allow cooling breaks to extend bit life.
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