The Lisle Stretch Belt Tool for GM, No. 59560, features a double-sided design that allows the tool to work on both A/C and main drive pulleys when installing stretch belts on GM 5.3L, 6.2L, and 6.6L gas engines. The long tab is used on A/C belts found on 2014 and newer GM trucks, while the short tab is used on the main drive belt found on 2019 and newer GM engines. The tool is made of heat-treated steel for strength and has a black oxide finish.