The Royal Products Chuck Shop provides a simple method for locating short parts in a three jaw lathe chuck. The captive, web-shaped design eliminates the danger of using spacers or parallels that could come loose and be thrown from a spinning chuck. Three strong magnets further secure the stop to the chuck face. This stop allows short parts to project past the chuck jaws, providing clearance for facing operations. Set-up time is greatly reduced and it accommodates chuck jaws up to 55 mm.