The OnGuard Brute STD U-Lock offers a X4P Quattro Locking Mechanism for four-sided protection, and a longer 115x202mm (4. 53" x 7. 96") TriRadius shackle that provides more locking options. It's perfect for powersport applications. Shackle Dimensions: (W x H x Diam) 111mm x 260mm (4. 53" x 7. 96") x 16. 8mm (0. 66")Shackle Dimensions: 115mm x 202mm (W x Hx Diam) (4. 53" x 7. 96") x16. 8mm (0. 66") D.