About Blackburn Sing Sing Compact U-Lock Bike Lock
The Blackburn Sing Sing Compact U-Lock Bike Lock makes it virtually impossible for someone to hack into your locking system and take your bike. Constructed of a hexagonal 14mm alloy steel shackle with an anti-scratch liner, the Sing Sing Compact U-Lock Bike Lock is engineered for 12 tons of cut-strength and features a U shape that won't swivel when cut through in one place because of a dual bolt lock mechanism that engages at both of the shackle's ends. And the lock mechanism is impervious to bump keys and picks.