Enco Cross Slide Tool Bit Holder Compound Machinist Tool. NCO 405G x 100 Lathe. The Enco Cross Slide Tool Bit Holder is a precision tool designed for machinists to securely hold. And position tool bits during machining processes. This tool is specifically designed for use on lathes and provides accurate. And reliable tool bit positioning for consistent and high-quality results. This cross slide tool bit holder came off of an Enco NCO 405G x 1000 lathe. It is in fair condition. It slides by turning the wheel.