3pcs HSS Spiral Grooved Step Drill Drills Bit High Speed Steel Cut Tool Set
3pcs HSS Spiral Grooved Step Drill Drills Bit. 1/4" quick change hex shank can be used in any drill or drill press. Includes 1pc 3/16" to 1/2" six step bit, 1pc 1/4" to 3/4" nine step bit, 1pc 1/8" to 1/2".