The jaws automatically tighten the filter Will take a 3/8" ratchet or 21 mm wrench Heat-treated carbon steel with a durable black oxide finish The compact, low-profile design allows for gripping in tight spaces Adjustable from 60 to 80 mm Use this adjustable oil filter wrench to secure 60-80 mm oil filters for easy removal. The heat-treated carbon steel jaws, finished with a durable black oxide, grip the filters firmly when pressure is applied with a 3/8" ratchet. The compact, low-profile design allows this filter wrench to grip better in tight spaces. The jaws automatically tighten the filter more securely when used with a 3/8" ratchet or 21 mm wrench. Made of heat-treated carbon steel with a durable black oxide finish.