Irwin 10239 Step Drill Bit, Self-Starting, 1/2', Size In=7/8 & 1-1/8 BF15 and industrial uses

and industrial uses

Aluminum & fluted

Chickweed and more

Provides tight seal & layer of waterproofing protection

21 air foil curved vanes with rolled van edges to deflect water

Irwin 10239 Step Drill Bit, Self-Starting, 1/2', Size In=7/8 & 1-1/8 BF15 and industrial usesHighlights: Size 7 8" & 1 1 8" Size KO=1 2 & 3 4 Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates Single flute cutting edge for greater control through steps Patented single flute cutting edge gives the user a true round hole every time 3 faltted shank prevents slipping in drill chuck New SpeedPoint tip penetrates faster than previous Unibits and prevents walking Speed point tip