The SLB and SOB series are shaft mounted clutch/power-on brake packages that are used to couple two parallel or in-line shafts. The clutch/brake package combines the features of our model SL or SO with an FB into one unit for easy installation. The clutch armature hub accommodates a pulley, gear, sprocket, etc., to transmit torque to the second shaft. The brake is used to stop or hold the load. The clutch/brake package is shaft mounted and retained by a loose-fitting pin or bracket through the anti-rotation tab..