Metallics HSSC2E Drill Bit HD Cobalt St 135d SplPt 5/64" 2" YLW (1pc)

The HSSC2E is a 5/64 inch diameter cobalt jobber bit with a 2 inch overall length, straight shank, ground to a 135 degree split point. That diameter is a common pilot size for self-tapping screws and small anchor layout work in steel.

That is what the geometry is for. A 135 degree split point starts on its own without a center punch and resists walking on hard, slick surfaces, and the cobalt alloy holds its edge at the higher temperatures you generate in stainless, strut, and steel plate. Run it slow with steady pressure and cutting fluid; speed is what kills cobalt bits in stainless.

One bit per pack, supplied in a pouch. If you are stocking a van or a shop crib, order multiples of the 5/64 inch size rather than expecting a set.

Yes. It is a straight shank bit at 5/64 inch, so it drops straight into any standard three-jaw keyless or keyed chuck. It is not a hex or quick-change shank, so it will not snap into an impact driver collet.

Plain HSS is fine for mild steel, aluminum, and wood. Go cobalt, as this bit is, when the material is stainless, abrasive, or work hardened, or when you are drilling repeatedly and want the edge to survive the heat. For a 5/64 inch pilot in stainless strut or a stainless enclosure, the cobalt is the one that finishes the hole instead of glazing over.

The yellow finish is how the bit is identified in a drill index or pouch, so a 5/64 inch cobalt does not get mixed in with your plain HSS bits on a job. It is a cosmetic and sorting feature, not a coating that changes how it cuts.