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 135°Split 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 4241, rolled with titanium plating, and the handles are all hexagonal handles Color: Gold Material: high speed steel Package Contents: 29 x Drill Bit 1 x Hexagon Shank Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.