Value Collection 01188218 No. 21 Hss Jobber Drill Bit

Product Description

The VALUE COLLECTION 01188218 is a wire-gauge jobber-length drill bit sized at No. 21 (0.1590 inches decimal equivalent) with a standard 118-degree split-point geometry and a black oxide finish. Built from high-speed steel (HSS), this bit is suited for general-purpose drilling in steel, cast iron, and similar ferrous materials. The web-thinned, tapered web design reduces thrust at entry and extends cutting life under production conditions. At 3.25 inches overall length with a 2.125-inch flute length, it fits standard drill chucks and right-angle drill setups common in mechanical, HVAC, and plumbing trade work.

This bit is appropriate for residential and light commercial applications where a No. 21 wire-gauge hole is required — typical uses include tapping pilot holes, clearance drilling for fasteners, and sheet-metal penetrations. The straight cylindrical shank seats securely in keyed or keyless chucks. The regular spiral flute geometry provides reliable chip evacuation in both through-hole and blind-hole drilling. Sold individually per package; minimum order quantity is 12 units.

Key Features

• No. 21 wire size — 0.1590 inch decimal diameter for precise gauge-matched holes
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High-speed steel construction rated for steel and cast iron workpieces
• Black oxide coating provides light corrosion resistance and reduced friction
• Regular spiral flute with right-hand cutting direction for conventional drilling
• Straight cylindrical shank — compatible with standard drill chucks

Compatibility

Designed as a general-purpose jobber drill bit for use in standard keyed or keyless drill chucks accepting a 0.1590-inch straight shank. Primary workpiece materials include steel and cast iron.

Installation Notes

Installation and use of this bit falls within the scope of any trade professional using a hand drill, drill press, or right-angle drill. Secure the shank fully in the chuck before operation and confirm the workpiece is properly clamped or fixtured. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend tool life and maintain hole tolerance. Replace the bit when cutting performance degrades or the point shows visible wear to avoid oversized or off-center holes.