Souber | CWB15 14.6mm Carbide Tip Wood Cutter For Souber Lock Jig Morticer Brand New Replacement TCT Wood Cutter For Souber Small Bore System These TCT Wood Cutters are specifically designed for the Souber Lock Jig. With there specially manufactured Tungsten Carbide Tipped cutters they have a high cutting speed and have no problems powering there way through wooden doors whilst leaving a clean and precise cut within the doors recess. PLEASE NOTE: THIS CUTTER WILL ONLY WORK WITH THE SMALL BORE SYSTEM SHAFT AS IT HAS A SMALLER THREAD THAN THE STANDARD SHAFT.