Brand: TOGU Handle Material: 1.2mm Wall Thickness Commercial Grade-304 Stainless Steel Mounting Standoffs and Threaded Fastener Bolts Material: 100% Solid German Standard Commercial Grade-304 which will result in a very long durability and usage. Finish: Satin Gold Total length: 600mm/23.622 inches Cross-Section Specification: 38X25mm or 1.5X0.98inches (FrontXSide) Center-to-Center Mounting Distance: 575mm/22.638 inches Attention: If you are purchasing new handles for the replacement of the old ones, the allowable tolerance for existing hole to hole distance is 575mm/22.638 inches(+/-)1mm/0.04inches. Note: Each purchase comes as a PAIR of door pulls for inside and outside of a single door. For double doors, 2 pairs are required. Steps for Installation: Drill and create two end to end holes between 0.315 - 0.600 inches (0.375 is recommended) on the door with a Center-to-Center Mounting Distance. Use the Hexagonal Allen wrench to lose the hex socket set screws in the top and bottom pull connection base, remove apart the inner side and outer side of the door pulls. Put the inner side pull handle and outer side pull handle aligning at each other and tighten the 4 pieces of the hex socket set screws in the top and bottom pull connection base. This completes the installation process.