Fangrui Product Details Hex Shank Drill Bits With Titanium Coated High Speed Steel, Increasing Wear Resistance And Durability. The Is Hardened And Honed For Sharpness, Suited For Wood, Aluminum Alloy, Stainless Steel, Plastic, Etc. Flutes Form And 135split Point: 135 Split Point Makes Drilling Easy With Less Pressure And Prevents Drill Bits From Walking. Quick Change: 1/4inch Hex Shank Compatible With Power Screwdrivers, Impact Drivers, And Other Tools That Accept 1/4inch Hex Shanks, Eliminates The Frustration Of Shank In Chuck, Easily Locking Into A Chuck Without Slipping And Falling Off. Size: 1/16, 5/64inch, 3/32inch, 7/64inch, 1/8inch, 9/64inch, 5/32inch, 11/64inch, 3/16inch, 13/64inch, 7/32inch, 15/64inch, 1/4inch, 17/64inch, 9/32inch, 19/64inch, 5/16inch, 21/64inch, 11/32inch, 23/64inch, 3/8inch, 25/64inch, 13/32inch, 27/64inch, 7/16inch, 29/64inch, 15/32inch, 31/64inch, 1/2inch,storage In A Box With Size Index Remarks: The Specifications Of This Product Are All Sizes. The Material Of This Product Is High-speed Steel 4