Straight Shank Drilling High Speed Steel 15.5mm HSS Black Oxide Jobber Length Twist Drill Set Dimension: 1/2 in L x 1/2 in W x 7-1/4 in H *Rough Estimation* Shipping Weight: 7 Ounce *Rough Estimation* Size: 15.5 mm Overall Length: 7-1/4 Inch Long *Rough Estimation* Made Of High Speed Steel (HSS M2) For General Purpose, For Metals And Alloys, Wood And Plastic, Great For Indoor And Outdoor Work Black Oxide Bits Are Long-Lasting And Wear Resistant Bits, Lasting Up To 2 Times Longer Than Normal HSS Bits Straight Shank Will Fit In Any Common Drill Qty: 1 Light Item