This is the REVO® SFM-A2 (Crank, Type A Skid) #A-5764-0021. The SFM variants offer a range of tip arrangements which, combined with the knuckle joint between module and holder, provide access to the features most difficult to reach. The A-series of modules is designed to deliver high performance with a good level of capability to access part features. The cranked skid arm design of the A2 module provides additional clearance around part features.