One piece is corresponding to 10 adjustment hooksFeature 1:Arbitrary adjustmentArbitrary disassemblyFeature 2:Threading self-lockingFeature 3:Reinforced nut head for stronger load capacityThe hook has a weight of 88 lbs (40 kg) Sliding picture hooks can be used on any 1.5 - 2.0 mm nylon rope or steel cable to hold the frame using D-rings or wires.The photo hook slides the drawstring up or down like a zip for easy artworkThe hook works with maximum artwork gallery photo striking systems with 1.5 - 2.0 mm ropes, cables, or wires