They use a Phillips drive with a bugle head. Some listings also note that a driver bit is included with the screws.
They are described for exterior wood use, including pressure-treated decking, railings, deck framing, and general outdoor projects such as siding, fences and gazebos.
Available gauges shown include No. 6, No. 8 and No. 10.
Several listings mention coarse threads. Tip styles described include sharp or piercing points, and some descriptions use the term "self tapping."
Features include the bugle head for low-profile countersinking, a Phillips drive, included driver bits on some packs, and sharp tips and threads to aid penetration.
