Cobalt step drill bits are normally more expensive than normal step drill bits that are normally made from high speed steel, in this video I test out some cobalt step drills that I purchased from bang good. I order the three step drill set as it was the only set that had flats machined onto the end of the drill bit, at about £12 delivered these were a real bargain, this is the set that I ordered- http://fave.co/2zb2IIT
I have since placed a few more orders with Banggood.com as they seem to have some real bargains.
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- Metalworking videos Tool Review videos
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- cobalt step drill