Features:

• 1. Econmial check master (Steel Gage Blocks) This Check Master, designed for convenient and quick testing of general calipers.
• 2. General check master (White Ceramic Gage Blocks) This Check Master is desiged to check the fixed accuracy of digital-controlled machine tools, machining center positioning and three-dimensional measuring machines.
• 3. Steel-made check master, with steel gauge blocks, needs attention to a