The Original Keeper 12 Standard has a 12mm hardened steel shackle and a disc-style cylinder. It offers moderate bike security in high theft areas.

Specifications:

12mm HARDENED STEEL SHACKLE
HARDENED DOUBLE DEADBOLT gives additional protection against cut and twist attacks
Includes 2 STAINLESS STEEL KEYS, with ergonomic design to reduce the amount of torque, and keep them from bending or breaking
Includes side mount, SNAP-IN BRACKET
DISC STYLE CYLINDER with center keyway
Key Safe Program
Product dimensions: 4" x 8" (10.2cm x 20.3cm) .
Product weight 2.05lbs (.93 kgs)
Security Rating: 5/10