Sharp Chucks & Machines Ltd supplies Spare Wedge Chuck Piston. 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 Wedge Chuck Piston is available in a set of two, three and four jaws configuration and is suitable for use in different types of chucks. The Spare Wedge Chuck Piston is mainly used as spare parts of power chucks and comes in diverse sizes and specifications.