Ratcheting head with freewheel position allows maximum leverage. Set ratcheting head to the middle or neutral/freewheel position and once maximum travel point is reached simply click lever into place to lock the ratchet mechanism. Comes with extension for hard-to-reach idler pulleys. This tool will work where conventional ratchets or breaker bars wont fit due to limited access. Removes and Installs Belts on Serpentine Belt Systems Using the Spring Loaded Idler Pulley. Includes: 59650 Ratcheting Serpentine Kit, 11pc. Molded Case. Shipping wt. 3 lb. 4 oz. 57390 14mm Socket 57440 15mm Socket 57450 18mm Socket 57500 13mm Socket 57530 3/8 Sq. Drive 57560 1/2 Sq. Drive 57580 16mm Socket 59100 Extension 59140 19mm Socket 59190 Handle Assy. 59640 17mm Socket 59660 Case for 59650 59670