Twisted belts are used as quick-fix replacement belts for round O-Ring drive belts. These are used on line-shaft conveyors as a quick and easy replacement for solid round o-ring bands. No need to drop the line-shaft to install these belts. They should be ordered 6% shorter than the round O-ring belts they replace. They are typically stretched 16-17% vs. 10-12% for O-ring drive bands. Stainless steel metal or plastic hooks available for most sizes. An installation tools is available.