Features and Benefits: Padded, removable side rails; Easy on/off design and fully adjustable; Quickly adapts to most floor jacks with removable saddles; Hang bumpers, store glass, many other uses; Fits jacks with saddle hole dimensions of 1.17" - 1.19"; One man operation - geatly reduces labor time. Padded, remoeable side rails. Easy On/Off design and fully adjustable. Quickly adapts to most floor jacks with removeable saddles (jack not included). Fits jack with hole diameter 1.17 in. to 1.19 in. (30mm).".