See Downloads Tab above for ASI 129 technical data sheet (.pdf)

Security Safety Towel/Clothes Hooks Strip for surface mounting is fabricated of type 304 stainless steel alloy 18-8. Back plate is 14 gauge. Clothes hooks are solid bar 3/8" diameter of one-piece construction with 1" diameter swivel trip-ball. Safety hooks snaps down when load exceeds 35 lb (16 kg) limit. Trip-ball socket housing prevents hooks from being set in vertical-up position. All exposed surfaces are No 4 satin finish. The unit is provided with six (6) clear mounting holes that accepts 1/4"-20 x 2" long (M6 x 51) stainless steel pin-Torx® button head machine screws (supplied).