The Magnetic Tape Holder has been designed with no removable parts and works with most industrial measuring tapes. It is a great little magnetic pocket level and a third hand when doing difficult measuring jobs while working alone. Secure the end of your tape while laying out close tolerance measurements from the end or the center of your material. This tool is machined from aluminum and anodized for a protective finish. A strong 25 pound pull magnet set in epoxy secures the tape holder to your work. There is a rare earth magnet at one end of the tool to hold your tape measure in place while laying out difficult jobs. Size is 5/8 inch square by 4 inches long.