The MetalTech 5 In. Caster with Lock offers a heavy-duty, double-locking caster wheel. It comes with a locking pin to secure the caster to the frame leg and to the outrigger. Designed to prevent damage to floor surfaces, the smooth rolling caster is non-marking and easily roll over extension cords for safe, convenient use around the jobsite. The Stem hole diameter is 0.047 In., stem distance from caster is 2-1/2 In. and stem height is 4 In. Meets ANSI, OSHA and CSA standards for safety.