This is a very stable cobalt drill with extremely high heat resistance. With its parabolic wide flute it is ideal for chip removal. Particularly excellent for long-chipping materials. The drills are packed singly in a plastic box and are available in imperial / fractional sizes 1/16" to 1/2" . The drills have a cylindrical shank, 130 degree wide angle point and have a drilling depth of 5 times the drill diameter.
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- Ruko Cobalt Imperial Size Twist Drill Bits