Material: carbon steel Surface treatment: white zinc plating Bright zinc coating helps prevent rust, suitable for business, home, or DIY shelving projects J bolt safety pins are compatible with shelf systems featuring 6 mm (1/4 inch) alignment holes Designed for use in mobile racks and beam assemblies; each pin provides secure locking under load Each pin withstands an upward force of 1000 pounds (453.6 kg) without failure or detachment Tool-free installation: simply insert the smaller end into the pallet rack alignment hole; gravity secures the pin in place Low maintenance Round head diameter: 12 mm (0.47 inch) Pin diameter: 6 mm (1/4 inch) Total length: 40 mm (1.57 inch) Thickness: 1.5 mm (0.06 inch) Single pin weight: 8.8 g