Irwin 12411 HSS Countersink 1/2 In Cutting Diameter

General Tools rose pattern countersink drill bit with 1/2 Inch cutting diameter in HSS construction. Creates clean tapered seats for flat-head fasteners across fabrication, machining, and assembly...

Irwin cobalt HSS jobber drill bit at 1/2 inch. Cobalt construction extends bit life on stainless and hardened steel vs standard HSS. Used in mechanical assembly drilling work.

Irwin Hanson Silver and Deming HSS drill bit at 1 inch with 1/2 inch reduced shank. Reduced shank fits 1/2 inch chucks while large cutting diameter drills holes too large for standard jobber bits.

Irwin Unibit-10 HSS step drill at 1/2 inch in single step size with self-starting tip. Single step bit produces 1/2 inch holes in sheet metal and thin-wall material. Self-starting tip eliminates...

Irwin Unibit-1 HSS step drill covering 1/8 inch through 1/2 inch in 13 step sizes with self-starting tip. Self-starting tip eliminates pilot drilling on sheet metal and thin-wall material. Used by...