Fitment: The long tab is used on the A/C belt found on 2014 and newer GM trucks. The short tab can be used on the main drive belt found on 2019 and newer GM Features: 1) Double sided design allows the tool to work on both A/C and main drive pulleys when installing stretch belts on GM 5.3.L, 6.2L, and 6.6L gas engines 2) Made of premium quality steel with black oxide finish for rust and corrosion resistance. Built to last, this tool is heat treated to ensure high strength and good durability .