For your M3 rigging needs, this 4-pack of CineMilled M3 x 5mm Stainless Steel Screws are 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.