KnKut 29 Piece Jobber Length Drill Bit Set 1/16"-1/2" by 64ths 3/8" Reduced Shank KnKut 29 Piece Jobber Length Drill Bit Set 1/16-1/2 by 64ths 3/8 Reduced ShankPremium grade KnKut Drills are manufactured from a high grade Molybdendum high speed steel, that has high vanadium content. KnKut Performance Drills are salt nitride treated, actually penetrating the tools surface giving KnKut Drills the hardness to drill tough materials such as stainless steel and titanium alloy.Made In USA3/8 Reduced Shanks3-Flats on Shank (sizes 3/16 and above)135° Degree Split TipDrills Stainless Steel and Titanium AlloySizes: 1/16 - 1/2 by 64ths 29KK38