Irwin 10234 Unibit4 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit Contaminated Recovery Run Time: up to 60

Run Time: up to 60 hours

providing a precise

Chrome-molybdenum alloy steel for long life

Thanks to the STEELMAN PRO Slim Profile LED Headlamp

Irwin 10234 Unibit4 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit Contaminated Recovery Run Time: up to 60Irwin 10234 Unibit #4 12 Step High Speed Steel 3 8 inch Step Drill Bit. 1 16 inch Steps (3 16 to 7 8 inch) Save time by eliminating the need to change drills when drilling round holes in thin materials. Each smaller size drill also acts as a pilot for the next size. Made from industrial grade high speed molybdenum steel heat treated for maximum durability. Ideal for drilling holes into thin materials such as stainless steel. copper. brass. aluminum.