circular magnetic chuck Feature: 1. While turning magnetic force ON/OFF, the flat face accuracy of magnetic force surface doesnt change and can keep high precision processing surface. 2. The fine-pitched magnetic poles make it ideally suitable for small and thin work pieces. 3. Made from permanent magnet,with strong and less remained magnetism. 4. Specially designed for steady and high precision operation. Parameters(Unit:mm)Parameters(Unit:mm) Model