About This

【Pakcage Includes】5pcs M35 HSS Countersink Drill Bit: Diameter 1/4",3/8",1/2",5/8",3/4",Quick Change Shank. Each drill bit is engraved with dimensions so you can easily select the exact bit you need.
【M35 High Speed Steel】HSS surface plated with Titanium Aluminum Nitride (TIALN) treatment, increases hardness, corrosion protection, wear resistance and durability, for longer service life and higher drilling efficiency.
【Five Flute Design】Five cutting edges for Fast chip removal and heat dissipation, Fast and smooth drilling.
【Multiple Application】Drilling/Countersinking and Chamfering of surfaces of stainless steel (below 2MM), Iron, aluminum, copper and other metals, wood and plastics, etc.; (drilling stainless steel is recommended to slow down the drilling speed).
【High Compatibility】They can be used with hand drills, bench drills and electric drill (If you choose a electric drill, please drill vertically and do not swing from side to side. The drilling feed speed should not be too fast,Recommended 2000-5000 RPM,MAX 5000 RPM). Notice: Only flat drilling mode can be selected, impact and hammering modes cannot be used.