Features: Adjustable for non-standard stud spacing, Interlocking tab prevents accidental disassembly, Unique, one-piece, break apart design. Can mount multiple 1 1/2" or 2 1/8" (or up to 54mm) deep boxes . Notched and marked for easy identification and bending, Improved design with stamped markings and pilot holes accelerates precise box and conduit mounting between studs, Pilot holes allow easy box attachment with a screwdriver, Can be mounted on face or inside of stud, Reduces movement of the box when used with flexible/rigid conduit or pre-wired cable systems. Notes: For an innovative pre-fab solution see the CADDY Glider (TSGLDR1). Product Specifications: Box Depth (in): 1 1/2 in, 2 1/8 in, 2 1/2 in, Box Depth (mm): 38 mm [Max], 54 mm [Max], Finish: Electro-zinc plated, Standard Packaging Quantity: 50, Stud Spacing (in): 17 to 26, Stud Spacing (mm): 432 mm [Min], 660 mm [Max], Third Party Certifications: cULus, Ultimate Static Load (lbs): 50 lbs, Ultimate Static Load (N): 220 N.