For your 3/8"-16 set screw needs, this 4-pack of CineMilled 3/8"-16 x 0.5" Stainless Steel Set Screws is tough, durable, and suitable for use in rigging your cine equipment. Made in the USA from 318 stainless steel, each screw resists corrosion, even if completely submerged in salt water. Each set screw, or grub screw, uses an Allen wrench to tighten it in place.