This Dillon Index Bearing Cam Block replaces the stock steel rub block for smoother action. Since it has a rotating bearing instead of steel rubbing on steel, there is no need for any greasing of the index pawl to reduce friction. This will fit the Dillon XL650 reloader. Made from Aircraft Aluminum and anodized “Dillon” Blue to match the Dillon color scheme. Just remove the steel block from your Dillon reloader and replace with this new Index Bearing Cam Block using the same screws. Tighten the screws just enough to allow you to move and align the block slightly to get the proper indexing of the shell plate. Then fully tighten the screws and you are ready for reloading. PLEASE CHECK OUT OUR OTHER DILLON RELOADING PRODUCTS-Case Feeder Plate Knob-Powder Bar Adjustment Knob-Quick Disconnect Clamp