The T-Track Lever Clamps slide into the T-Track slots in the table top and operate by simply pulling the lever. The T-Track tang extends directly under the workpiece to apply extreme clamping pressure. TwoT-Track Lever clamps are included in our PantoRouter ProPack Package and they are sold individually. We have found these to be the the easiest and fastest clamps for the PantoRouter. They providing an extremely secure workpiece with minimal effort. We highly recommend these lever clamps!