For your 1/4"-20 rigging needs, this CineMilled 1/4"-20 x 1/2" Stainless Steel Screw, in a 4-pack, 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, allowing you to create a long-term rig that can be disassembled about as easily as the day you built it.