Long, narrow neck allows tool to reach deep into workpieces (e.g. grinding inside pipes). Extensive operator protection due to kickback stop, self-start lock, soft start, and electronic overload protection.Innovative collets with wrap around collar for workpiece protection and to prevent the wrench slipping when changing tools. Variable speed allows different tools to be used. POWERtronic tacho electronics for enormous power, reserve capacity and extremely uniform speed under load.Replaceable rubber neck bearing casing. Motor and electronics protected against metal dust.