Irwin Tools 10234 Unibit® 12-Hole High Speed Step Drill, 3/16" - 7/8" Autumn_Cleaning Precision honed C3 tungsten carbide

Precision honed C3 tungsten carbide tips hold their longer

Completely Corrosion-Proof

and 4" DWV pipe

They're ideal for today's smaller lawns

Fits standard 161 door prep with through-bolting through the door

Irwin Tools 10234 Unibit® 12-Hole High Speed Step Drill, 3/16" - 7/8" Autumn_Cleaning Precision honed C3 tungsten carbideIdeal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. Features 3 flatted shank, shank size 3 8". Single fluted cutting edge assures true round holes & allows greater control. Hole sizes: 3 16" 7 8" Maximum material thickness: 1 8" Number of holes: 12 steps 3 flatted shank Shank size 3 8" Single fluted cutting edge assures true round holes & allows greater control Ideal for drilling holes