Milwaukee 48 89 9239 Step Drill Bit Set 16 Hole Sizes, 7 8 in to 1 1 8 in, 1 4 in Step Increments, 2 PK DCD710S2 Includes Mounting Frame with 1 Includes Mounting Frame with 1 1 4 in Mounting Diamete UNF Material Machining Carbon Steel Coolant Fed Non Coolant Through Extended Shank No Die Finish Bright (Uncoated) Primary Material Application ISO Code H Extension Tap No Primary Material Application Ferrous Metal Number of Dies in Set 35 Case Type Plastic Case Extended Neck No Spiral Direction Right Hand Tap Material Grade GCr15 Class of Fit 2A Tap Type Straight Flute Package Quantity 1 Shank Hex Size 1 4 in Item Step Drill Bit Set Material High Speed Steel Finish black oxide Measurement System Fractional Inch Number of Pieces 2 Material Machining High Speed Steel Number of Flutes 2 Finish Machining Black Oxide Shank Type Hex Cutting Direction Right Hand Step Thickness 1 16 in Primary Material Application Steel