The inner diameter of the wire rack clamp is 25.4mm/ 1inch, the thickness is 2.8mm/ 0.11inch and the length is 43.2mm/ 1.7inch, fit the outer diameter of 1 inch post metal shelving sleeves and split sleeve lock metal shelf. These have the 2 snaps into upright grooves in the back which is necessary for keeping the clips and shelves in place and snug fit, any 2pcs clips can quickly assemble the fixed bracket. The shelving sleeves is made of high-quality ABS plastic, which is strong, wear-resistant and not easy to crack. Wire shelf fixing clip are affordable shelving sleeves replacements for wire shelving system, can be used to fix the connection of shelf brackets in kitchens, restaurants, bars, coffee shops and bakery.