INTOO Hss Cobalt Drill Bits Set 29PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip,

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INTOO Hss Cobalt Drill Bits Set 29PCS Triangle Features

• SPECIFICATIONS:29PCS COBALT DRILL BIT SET： 1/16,5/64,3/32,7/64,1/8,9/64,5/32,11/64,3/16,13/64,7/32,15/64,1/4,17/64,9/32,19/64,5/16,21/64,11/32,32/64,3/8,25/64,13/32,27/64,7/16,29/64,15/32,31/64,1/2. Sizes from 1/8 to 1/2 with triangle shank.

• 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.

About INTOO Hss Cobalt Drill Bits Set 29PCS Triangle