"Speedy Belt Installer" -- Install twisted belts 10 times faster! Twisted belt installer tool makes installing twisted belts easy. No need to drop rollers or hurt your fingers trying to get the hook attached. Comes with hook tool and grappler-fishing tool. Works with most twisted belts and both metal and plastic hooks. Best with common twisted 3/16" and 1/4" belts. Belts thicker than twisted 5/16" are probably too large to fit.