Neiko 10227A Step Drill Bit (Uni-bit) Set with Carrying Case, Cobalt Coated HSS | SAE (1/8" - 1-3/8") | 9-Piece Set

The Neiko Tools 9-piece SAE step drill bit set comes with step drills ranging from 6 to 13 steps. With more steps than other step drill bits, these bits can drill more hole sizes per bit and reduce the need to swap out drill bits when progressively increasing the size of a hole. Clearly engraved markings on each step drill bit indicate what size hole is being drilled so you can always see what size hole you are drilling. Set is in SAE, and can drill holes from 1/8" to 1-3/8" in diameter. Neiko Tools step drill bits are also made to a high standard of quality. These bits are made with cobalt coated high speed steel. High speed steel is the standard for drilling through tough materials like metal, and makes these last longer than other drills. A cobalt and black coating provides even longer service life, stops heating, reduces wear and helps hold lubricant for smoother drilling. The dual flute design doubles drilling speed, quadruples service life, prevents jams, increases control and automatically deburrs while drilling. In addition, dual flute drill bits also double the speed of drilling, which makes jobs faster and gets more life out of cordless drill batteries. These bits use 1/4" and 3/8" tri-flat shanks, which provide a more secure grip when placed in standard chucks, preventing slippage and increasing torque efficiency. Included Bits: 1/4" Shank: 13 Step (1/8" - 1/2", 1/32" incr.), 6 Step (3/16" - 1/2", 1/16" incr.); 3/8" Shank: 9 Step (1/4" - 3/4", 1/16" incr.), 12 Step (3/16" - 7/8", 1/16" incr.), 8 Step (9/16" - 1", 1/16" incr.), 10 Step (13/16" - 1-3/8", 1/16" incr.), 12 Step (7/16" - 1-1/8", 1/16" incr.), 10 Step (1/4" - 1-3/8", 1/8" incr.), 13 Step (1/8" - 7/8", 1/16" incr.); Comes in an aluminum carrying case with labelled foam cutouts for organization and storage.