Use on workbenches orroll it up and take it with you. This heavy-duty soft vinyl mat has raised nubs that are designed tocapture and retain several hundred pins and prevent them fromspilling onto the floor. This new design has 4built-in Pinning Blocks for keying cylinder plugs and2Holding Blocks for cylinders. This feature helps organize keying and prevents mixing of pins and parts. Dimensions are 21-1/4″ x 11-1/4″ x 1/4″.