SPECS: Patent-pending design Chromoly-steel construction Makes for a great upgrade to the traditional two-piece wedge collar and wire ring design Ideal to replace just before installing a clutch kit Sold individually IN CASE YOU WANT THE BEST CLUTCH COLLAR This is the ACT Monoloc Collar that is available for separate purchase for those of you who need a replacement. Additionally, this is also an upgrade to the standard two-piece wedge collar and wire ring featured in pull-type clutches. The spring tension of the segmented retaining ring is carefully calculated and tested for optimal performance and provides a uniform loading on the bearing and pressure plate to assure proper alignment. It is also a durable piece as it features hardened Chromoly steel construction to provide long-lasting performance.