The Cal-Van Tools Serpentine Belt Tool, No. 738, is designed to make serpentine belt installations easier. This belt tool is designed to allow access to tensioners to relieve the pressure on belts for easy removal and installation, even in hard-to-reach areas. The tool features integrated hex heads in the handles (16mm, 6-pt, and 12-pt), and the set includes 3/8" and 1/2" drive adapters, socket adapters (13mm, 14mm, 15mm, 16mm, and 18mm) and crow's foot wrench adapters (13mm, 14mm, and 15mm).