Lisle Tool, Serpentine Belt Tool, Part #57900, Made in USA Fits pulleys requiring 13mm, 14mm, 15mm, 16mm, 18mm, hex and both 3/8” and 1/2” square drive sizesTwo extensions can be bolted on for hard to reach areasIncludes 14mm and 16mm sockets, plus an additional shorter extension This is used to remove or install belts on serpentine belt systems, using the spring loaded idler pulley. This set includes additional sockets and extension which expands applications to fit most domestic models. Also allows for a better reach where conventional ratchets or breaker bars won’t. Location: Building #2, through garage door, straight to the back wall