The best Slide-N-Guide on the market. Front chain slider fits stock and most aftermarket arms. New simple bolt-on front slider has extended wear length to control chain angle. Upper and lower zero drag Powerlip rollers set keeps the chain in line between drive sprockets. Rear guide has Powerlip rollers for power and disperses sand and dirt out of bottom. Powerlip rollers are replaceable at low cost. Rollers can swap out for solid wear pad. The solid wear pad (sold separately) is better option for woods or track riding or racing.