Form giving to a new product family: - ergonomically shaped handle, - all commonly used inserts can be manually replaced on demand, - the newly developed shaft fastener simplifies assembly, - no tension forces between the shaft and latch, - perfect force transmission, - full penetration of the shaft though the sprocket-wheel, - fast mounting with hook fixation (Protection class IP 40), - dust and moisture protection by protective cover on the inside (Protection class IP 65). Integrated guides prevent the swing handle to scratch the rim of the dish. The spring loaded handle separates automatically from the dish upon unlocking.