Sharp Chucks & Machines Ltd supplies Spare Hard Chuck Jaw Set. Sharp Chucks & Machines Ltd is an ISO 9001: 2000 recognised company manufacturing a wide range of Lathe Chuck & Machine Tool Accessories for various industrial applications. The Spare Hard Chuck Jaw Set is suitable for use on lathe chucks and comes with three or four jaws configurations. The Spare Hard Chuck Jaw Set is available in various sizes and specifications to suit all types of chucks.