Snap ring tool. Universally applicable for large snap rings with nominal diameters from 400 to 1000 mm. Safe opening and closing of the rings and secure holding through a self-locking precision spindle drive. Assembly or disassembly of the snap rings in one operation. Secure hold of the ring through short, direct fittings. Operation can be done with an internal hex key, ratchet wrench, or cordless screwdriver. Application areas include anywhere high forces and torque need to be transmitted with large shafts and bearings, such as in wind turbines, tidal plants, generator construction, hydropower plants, large machinery (rolling mills, presses), shipbuilding, and aerospace. Tool comes in a plastic case with foam insert. Capacity for half-moon, capacity in mm², square connection, capacity for square, capacity for stepped square, capacity for triangular, clamping range for hexagon, clamping range for round, clamping range for square, clamping span.