99% Metal Construction; Available in 2" & 1.25" Receiver Options; No Fade, Gray Powdercoat; Easy, No-Tool Installation; Holds Wheelbases up to 53" & Tire Sizes 18-29"; FastFit Wheel Chock System for Tool-Free Wheel Changes; OneTap Levers for Easy Unloading of Bikes; Features Flat 4-Pin LED Light Connector; Stainless Steel Hitch Lock Included; Optional Piston Pro X Add-On to Carry up to 4 Bikes (sold separately)