• 19 cm diam. x 4.2 cm
• Internal Shackle Size (mm): 50H x 45W

Kryptonite Stronghold Surface Mount provides a permanent locking point for your bike, and can be installed indoors or outdoors. It bolts directly into cement or concrete using three anchor bolts. The masonry bits needed to drill the bolt holes are included, along with all the other tools you'll need, such as 4mm and 6mm Allen keys, and hardened security balls and cover disks to stop the bolts being unscrewed. The anchor's 6mm hardened carbon alloy steel shackle lays flat when not in use, making it safe to drive or walk over. It's wide enough to pass a chunky cable lock through.