Metallics HSSC10E Drill Bit HD Cobalt St 135d SplPt 7/32" 3-3/4" YLW (1pc)

The HSSC10E is a 7/32 inch diameter bit with a 3-3/4 inch overall length. That 7/32 is the common tap-drill size ahead of a 1/4-20 thread, so it is a frequent pick for bolting strut, panel enclosures, and equipment feet into steel.

Cobalt is the right call for stainless, cast iron, and work-hardening alloys. The Metallics HSSC10E is a heavy duty cobalt bit, and cobalt holds its edge at the higher heat those materials generate, where a plain high speed steel bit dulls and starts rubbing instead of cutting. For mild steel, aluminum, or wood, plain HSS does the job fine and cobalt is overkill.

A 135 degree split point starts cutting without walking, so you can hit a layout mark on smooth steel without center punching first. The flatter 135 degree angle also spreads the cutting load, which is what you want on stainless and hard plate. The HSSC10E has that geometry ground in.

Straight shank, so it chucks into any standard keyed or keyless drill chuck, corded or cordless. It is not a hex shank or SDS bit, so it will not lock into an impact driver's quick-change collet.

One bit per pouch. It is sold as a single 7/32 inch piece, not a set or an index, so if you are stocking a truck or a maintenance crib you order the quantity you need of this one size.

The yellow finish is how cobalt bits are typically identified on this line, which makes the cobalt easy to pick out of a drill index or pouch when a black oxide or bright HSS bit would look similar. It is an identification finish, not a coating that changes how the bit cuts.