Irwin 10234 Unibit4 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit Contaminated Recovery #10 and #12

#10 and #12

Here's a great set of extractors

Item model number : 480300

Chrome-molybdenum alloy steel for long life

Lift Height: 16 1/2"

Irwin 10234 Unibit4 3/16-Inch to 7/8-Inch 3/8-Inch Shank Step Drill Bit Contaminated Recovery #10 and #12Irwin 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.