INTOO Hss Cobalt Drill Bits Set 29PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip,
- 003cb003eSPECIFICATIONS:003c/b003e29PCS 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..
- 003cb003eGOLDEN RATIO TIP:003c/b003eFrom 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..
- 003cb003eCOBALT 5% MATERIAL:003c/b003e suitable for stainless steel or any hard metal,significantly increases the ware-resistance and durability..
- 003cb003eSTORAGE BOX:003c/b003estrong metal box..
- 003cb003eHOW TO USE:003c/b003econtrolling the drilling speed by lowest RPM would make drill life much longer than 3 times..