Cobalt Steel Drill Bit, 3/8-In.

Marsoni

M251S

$11.49

Get it in 3 business days with 1 day shipping. Friday, May 29

Cobalt Steel Drill Bit, 3/8-In.135 degree split point to minimize walk. Cobalt for higher heat & abrasion resistance. Heavy duty web construction for strength & durability. For tough metal drilling, including heavy duty abrasive, alloy metal drilling on hardened steel.

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
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I highly recommend! These are so comfortable! Right out of the box, they can be worn all day. The velcro-adjustable straps are great for making for a perfect fit. The aren't clunky to wear, even though they appear to be. They're super cute, in my opinion. The sock liner is textile, so feet feel good all day, not slimy, like leather and suede can sometimes make feet feel if socks aren't worn.

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Reviewed in the United States on March 17, 2026