4-12/4-20/4-32mm M35 Cobalt Step Drill Bit Set Tapered HSS-CO HSS Drill Bit Kit

Features:

100% brand new and high quality. HSS-CO M35 Spiral grooved Step Drill Bits Cut Tool Set. Made from HSS-Co, heat treatment to it, high hardne, high wear resistance, high toughne, high bending strength, sharp edge, the best choice for proceing stainle steel, better than ordinary step drill. Cobalt plating to reduce mit and run cooler. Automatically deburr holes as you drill. Unique step structure, a drill bit that allows you to make holes of various sizes, making the perfect hole is easily. A step drill with a box. very convenient. Triangular handle design. 4-12:4/6/8/10/12mm(5 Steps) 4-20:4/6/8/10/12/14/16/18/20mm(9 Steps) 4-32:4/6/8/10/12/14/16/18/20/22/24/26/28/30/32mm(15 Steps)

Descrtion:

Does not need center punch to aist it, compared with ordinary hemp flower drill, it is stabler and difficult to be broken.It is suitable for being installed on the drill and bench drill, applicable for punching on harder workpieces, widely used to cut holes in a variety of material like stainle steel tapping steel, wood, thin iron, aluminum alloy, moisture boards, PVC sheet, ect

Note:

Please water it for cooling while punching so that can prolong its lifetime, rotation rate from 250 to 400 is recommended.The computer display effect is different, please allow a certain color difference

About shping
Shping and Packaging All it will be double checked and well packed before sending.It will be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for e areas,it may take a little longer). 

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