Cle-Line
Cle-Line C21115 21-piece 135-degree jobber drill bit set
A 21-piece jobber-length drill bit set with 135-degree points made from high-speed steel and finished in black oxide
- TypeDrill Bits
- 21-piece set covers a wide range of drilling tasks
- 135-degree point angle reduces walking and starts holes cleanly
- High-speed steel construction resists heat during extended use
- Black oxide finish adds corrosion resistance and lubricity
- Heavy-duty jobber length suits general-purpose metal and wood drilling
21-piece jobber drill set
This Cle-Line C21115 set contains 21 high-speed steel jobber-length drill bits with a 135-degree point angle and black oxide finish. The assortment is designed for general-purpose metalworking and maintenance tasks where a broad range of diameters is required.
Mechanics needing a full fractional range
The 21-piece count suits technicians who want a single index covering common fractional sizes for steel, cast iron and non-ferrous alloys. Buyers who require metric diameters, cobalt alloy construction or specialised coatings for stainless steel should look at alternative configurations.
Black oxide bits under sustained drilling
The black oxide finish helps retain lubricant and reduce chip welding during extended drilling cycles in mild steel. High-speed steel construction maintains hardness at elevated temperatures encountered in repetitive holemaking, though heavy-duty production runs in abrasive alloys will wear the cutting edges faster than cobalt alternatives.
Highlights
- 21-piece set covers a wide range of drilling tasks
- 135-degree point angle reduces walking and starts holes cleanly
- High-speed steel construction resists heat during extended use
- Black oxide finish adds corrosion resistance and lubricity
- Heavy-duty jobber length suits general-purpose metal and wood drilling
Specifications
| Brand | CLE-LINE |
|---|---|
| Type | Drill Bits |
Questions about this item
What size drill chuck do I need to hold the 135-degree jobber bits in this 21-piece set?
The bits have standard jobber shanks that fit any 1/2-inch or 3/8-inch drill chuck rated for high-speed steel tooling.
Will these high-speed steel bits cut cleanly in the mild steel plate I already fabricate with older cobalt drills?
The 135-degree split point reduces walking on mild steel, and the black-oxide finish adds lubricity so the new bits complement rather than fight your existing cobalt set.
How can I confirm each of the 21 bits is cutting true after I start drilling?
Check that each hole shows a centred start mark, consistent chip evacuation and a round, burr-free exit — signs the 135-degree geometry is performing as designed.
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