DeWALT 3/8" x 4" Screw-Bolt+ Screw Anchors, Hex Head, Zinc Plated General Purpose and the clip is carbon

and the clip is carbon steel per ASTM A 568

An undersized square drive bit has a slightly more precise or tighter profile than a standard #3 square bit

The zinc-plated steel finish offers corrosion resistance suited to a variety of installation environments

Bolt/Rod Diameter: 1/4 - 20 (1/4 in

these screws combine proven performance with ease of installation

DeWALT 3/8" x 4" Screw-Bolt+ Screw Anchors, Hex Head, Zinc Plated General Purpose and the clip is carbonPowers Fasteners PFM1411280 3 8" x 4" High Performance Concrete Anchor Screw The Screw Bolt+ High Performance Screw Anchor is a one piece, heavy duty screw anchor with a finished hex head or flat head (countersunk). Suitable base materials include normal weight concrete, sand lightweight concrete, concrete over steel deck, concrete masonry and solid clay brick. It is simple to install, easy to identify and fully removable. The patented thread design,