The attachment device is a high quality aircraft grade 3/8" diameter stainless steel detent locking pin with a T-handle. It is durable enough to stand up to the kind of abuse common in the construction environment. The ARS Moveable Anchor can be used for fall restraint or fall arrest and is available in two sizes that attach to the five top chord dimensions used in wood framing. Another valuable tool and a “must have” to add to your collection of fall protection equipment. Moveable ARS 2x8 fits 2x4, 2x6, and 2x8 rafters 11 Ga. stainless steel powder coated red