Maximum Footprint: 3.5" (L) x 1.75" (W) x 0.5" (H Ring Down) or 2.25" (H Ring Up), 3M VHB industrial adhesive tape 2 square inches, Full steel construction base plate and ring with corrosion resistant chrome plating, 2 x 3/4" one way slotted security woodscrews (self drilling) for maximum security, Fold flat ring stores out of the way when not in use and accepts Kensington MicroSaver and ComboSaver Laptop locks.