INTOO Hss Cobalt Drill Bits Set 21PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip,

Price: $36.99
(as of Jul 16, 2023 20:17:36 UTC – Details)

INTOO Hss Cobalt Drill Bits Set 21PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip,
GOLDEN RATIO TIP:From size 5/32″ with patented “Golden Ratio” Tip,which especially designed for heavy duty purpose, effect clean&smooth holes on hard metal like stainless steel,and moreover, at least 3 times longer life.
COBALT 5% MATERIAL:suitable for stainless steel or any hard metal,significantly increases the ware-resistance and durability.
STORAGE BOX:strong metal box.
HOW TO USE:controlling the drilling speed by lowest RPM would make drill life much longer than 3 times.