ZMZ Titanium Step Drill Bit Set Hex Shank 28 Sizes 1/8'' - 3/4'' (S)

Specifications
â–²Material:HSS 4241
â–²Shank :1/4 Hexagonal
â–²Surface treatment: titanium
â–²Tools: pistol drill, bench drill

✔Made with drop forged heat treated high speed steel (HSS) with titanium nitride coating for longer life time.
✔High speed, titanium nitride coated steel Replaces 28 separate drill bits Two fluted design for fast, smooth cutting.
✔Automatically deburrs holes as you drill.
✔4241 high-speed steel, used in hardness under 25 ° workpiece, the plate thickness under 5 mm.
✔such as carbon steel plate, sheet iron, insulation boards, wood. Cannot be used for stainless steel.
✔When inject cold water while working, can effectively extend the service life of the drill bit.

❤Six step bit:3/16", 1/4", 5/16", 3/8", 7/16", 1/2"
❤Nine step bit: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"
❤Thirteen step bit: 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"

Package includes
3pcs Drill Bits