Stark USA 21PCS Turbo Stepped Tip Drill Bit Length 1/16" - 3/8" Drill Bit Set

Turbo Step drill bits 29pcs set, Reduced Shank Mechanics LengthMaterials: M35, Hardness Test: HRC 651/16" - 1/2"Three-flat shanks, reduced shanks above 3/8", and mechanic’s length for superior access in cramped spacesPS: 1/16“,5/64",3/32",7/64" can't do tri flat shank due to size is too smallBits size: All 29pc size:1/16“,5/64",3/32",7/64",1/8",9/64",5/32",11/64",3/16",13/64",7/32",15/64",1/4", 17/64",9/32",19/64",5/16",21/64",11/32",23/64",3/8",25/64",13/32",27/64",7/16",29/64",15/32",31/64",1/2"* 1/16“,5/64",3/32",7/64" can't do tri flat due to those sizes being too small and reduce shank apply to 3/8" after.