The Titan SlideGuide Crossbow Sled by Allen has many features and benefits over other crossbow cocking sleds on the market. First, we engineered it to fit as many crossbow rail designs as we could so you are not limited to a single sized width. Second, the use of the rails groove will keep the sled aligned as you pull the sled up. In addition to the sled design is the self-aligning guide spring system that runs along the side of the Crossbow rails to keep the sled perfectly aligned during movement. These two physical features work in tandem to keep your sled balanced and in perfect contact with the crossbow, which makes cocking easy. You'll find it takes less physical force to cock the crossbow with the Titan SlideGuide with its friction-reducing materials and design. Finally, with the silicone over-molded handles youll feel confident you wont lose grip halfway through the pull.