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I'm tired of paying ridiculously overpriced radial drill taps, so I talked to a friend in Japan who works at a factory that machines drills and drill taps, to have an original radial tap made. He first said that it was very difficult to machine ball threads, but after several rounds of sampling...

I have two gun drills for sale. They are both new, unused. They just didn't fit in my Cue Smith drill chuck. 0.775" and 0.650" coated carbide tip with 2 coolant holes. 17" flute length, 0.7" shank diameter. $85 each or $150 for both. $5 shipping to 48 states. Paypal/Venmo/Zelle

I have 4 sets available for sale. $70 each plus $5 shipping inside US. Zelle/Venmo/etc. It works with a AA battery and keeps rotating once you press the button. PM me for more detail. Thank you

I've been using carbide tipped coring drills but they are becoming dull and wondering if there is any resharpening service that I can just send the drills in. I could find multiple resharpening services on Google but most of them handle regular drill bits, router bits, etc. and wasn't sure which...