Wow! These super-long screws will make you put your hammer away forever! No more drilling 1/2" holes for rusty rebar, then slugging away with a sledge hammer for hours. With a self-drilling point, these screws go into pressure-treated lumber like a hot knife through butter, they won’t back out like nails, and they offer substantially greater holding power. The new “Spider™” Drive (like an 8-point star) works great (you get a free bit with each pack of 25, or 3 bits per carton). The 3/16" shank has approximately 2" of 1/4" diameter threads and an oversize 5/8" diameter by 1/16" thick head (dimensions are nominal). A special black epoxy corrosion-resistant coating is extra slippery. Use of these screws in Redwood or Western Red Cedar is likely to result in discoloration. Mix or match for pricing discount. Made in the USA.