Metallics HSSCN17E Drill Bit HD Cobalt St 135d SplPt #17 3-3/8" YLW (1pc)

It's a wire gauge size #17, not a fractional bit. Wire gauge numbering runs the opposite way to fractions, so a #17 sits between common fractional sizes and is usually chosen to match a specific tap or screw clearance rather than a fraction on the drawing. Overall length is 3-3/8 inches.

Cobalt is the right call for stainless, hardened steel and other tough alloys. The cobalt is alloyed through the high speed steel body, so it holds its edge at the higher heat those materials generate and it can be resharpened without losing the alloy. Carbide only becomes necessary for abrasive or very hard material where rigidity matters more than toughness, and carbide is far more prone to chipping in a hand drill. For a portable drill on stainless, cobalt is the safer pick.

A 135 degree split point starts cutting where you put it instead of walking across the work, so you can skip the center punch on most jobs. The flatter 135 degree angle also spreads the load over a wider cutting edge, which is what you want in stainless and hardened steel. A standard 118 degree conventional point walks more and needs a punch mark or a pilot.

Yes, it's a straight shank bit, so it drops into any standard three jaw keyed or keyless drill chuck. No reduced shank, no taper, and nothing special needed to hold it.

One bit per pouch. It ships as a single piece in a pouch pack, so if you're standardizing a truck stock or a shop drill index you order the quantity you need of this exact gauge rather than buying a graduated set.

The yellow finish identifies it as a cobalt bit at a glance, which matters when cobalt and standard HSS bits share a drill index on a job. Metallics catalogs the HSSCN17E as a yellow, heavy duty cobalt bit under its electrical line, where it typically gets used drilling enclosures, strut, panels and struck steel.