U-lock with carrier bracket. Double locking shackle withstands 3.5 tons of pull. 7-pin tumbler. Shackle diameter 1/2", vertical clearance 10-3/8", horizontal clearance 5-1/8". Covered lock body and shackle help protect bicycle finish. Keyed different. 8-1/4" wide body. Shackle seals and dust cover.