Black Claw™ Mounting Bracket, Telescoping, For Use With: 1-1/2 in, 2-1/8 in Electrical Box, 1-1/2 in Box to Studs on 16 in Centers, Specifications: 15-1/2 to 25 in Stud Spacing, Stamped Construction, Steel, Pre-Galvanized, Silver, 1.25 x 18.375 x 1.95 in Dimensions