Eagle Tool US Serrated Flex 3 8 in Woodboring Flex Drill Bit Storage Tower For maximum protection also install For maximum protection also install along rake edges to help protect shingles from wind uplift (and avoid the mess of hand sealing the rake edges) ) 7 Features Corrosion Resistant part number ETHXKIT187 Compatible with 3 16 inch shank extensions Series Name Serrated Flex bit Sub Brand N A Bit Type Flex bit Bit Length 24 in Shank Size 3 16 in Shank Type 3 flat Material High carbon steel Case Type Hard Quick Change No For Use With Power tool For Use on Metal No For Use on Wood Yes Warranty 30 day Set Individual Individual Package Quantity 1 Bit Diameter (Inches) 3 8 in CA Residents: Prop 65 Warning(s) Yes Brand Model Compatibility EX18736