The LARGE-MAGNET is an ultra-robust steel and aluminium magnet to attach to a Unilite LED work light (SLR-1300, SLR-2500, SLR-2750, SLR-4750, SLR-4400, SLR-6000, CRI-2300 & SP-4500). A secure locking wing nut is used to hold the site light securely in place.Dimensions: 54mm Diameter x 37mm Height