This Magnetic Chuck is made of copper material, with a powerful magnetic force, mainly used in various surface grinding machine, tool grinding machine as a workpiece positioning processing. The magnet's handle features a lock-on/lock-off mechanism that requires no electricity. Excellent Magnetic Force- Magnetic pole gap fine, uniform magnetic force, small work piece processing, the effect is particularly evident. Easy to Use Suitable for processing various magnetic workpieces on grinding machine. Removable handle, easy to storage. Easy To Operate The handle on the magnet features a lock-on /lock-off mechanism,It requires no electricity. A Set of Accessories Two screws, two pressing plates, and a stainless steel handle are concluded. Widely Used It is suitable for surface grinding machine, tool grinding machine, EDM, etc. and ideal for thin and lightweight items. High Precision - The main structure is stable, high precision. and the magnetic force spread evenly. Handle moves easily to turn chuck on and off. 6"x16" Permanent Magnetic Chuck Our magnetic chuck can be used for processing various magnetic conduction workpieces. For surface grinder, tool grinder, EDM, and other applications. Thin and lightweight workpiece are ideally suitable because of fine-pitched magnetic poles.