Erowa 9 in 1 tiny pneumatic chuck is compatible with ER-011803 Pneumatic Chuck 50 RSA. This set up is also comes for Erowa pneumatic chuck compatible ER-007604. System has 9 pieces of quick chuck 50 RSA ER-011803 or ER-007604 combined together with 9 locators which are designed for milling 9 workpieces at once. Perfect for small size electrode processing beneficial as it improves production efficiency in the limited space of CNC table. 9 in 1 Erowa system requires air pressure 6bars minimum, clamping force for every chuck locator can up to 6000N. It is controlled by air gun or pneumatic valves. Every 3 locators are controlled by 1 pneumatic valve.