This tool has beem improved , re-designed , patented and manufactured by Orient River Inc. This video is shot by Orient River and any copy or alteration of the content are strictly not allowed. To ensure the pulleys driver not lose the relationship to the cranshaft during repairing or replacing the timing belt. The Locking tool is for toothed pulleys spaced between approximately 0 to 60 mm apart. It is universal and adjustable for TwinCam and Diesel engines.