Metallics JRWS10 8 x 1-1/4 in. Round Washer Head Combo Sharp Point Tapping Screws - Steel Zinc - Each

Sharp point is the key detail. The JRWS10 is a sharp point tapping screw, which is meant for wood, particleboard and thin sheet material where the point can start its own hole. For heavier gauge steel studs or metal framing you want a self-drilling point (drill point) screw instead, not this one.

The JRWS10 takes a combo drive: the recess accepts either a Phillips bit or a square (Robertson) bit. On a ladder most electricians run the square bit because it holds the screw on the tip without a free hand, but a #2 Phillips will drive it fine if that is what is in the pouch.

The round washer head gives you a wide bearing surface that sits on top of the material rather than countersinking into it. That is what you want when you are fastening a box bracket, a strap, a plate or a flange over a hole or slot, because the broad head spans the opening and will not pull through. A flat head is for applications where the head has to finish flush.

These are steel with a zinc plating, which handles indoor and incidental moisture but is not a wet or corrosive location fastener. For exterior exposure, treated lumber, or coastal work, step up to stainless or a heavy coated exterior screw. Zinc plated steel in contact with ACQ treated wood will corrode.

The JRWS10 ships in a jar, which is the format most electricians and maintenance techs want on a van or a parts shelf, a screw-top container you can pour from and reseal rather than a loose bag. Metallics makes them in the USA.

In softwood framing and plywood, no, the sharp point starts on its own. Pre-drilling is worth it near an edge or end grain, in hardwood, or in brittle trim where a #8 shank can split the material.