The Bike-It Bolt-In Ground Anchor is the ultimate immovable object for home security.Thatcham approved protection - Certificate No. TQA577Heavy duty ground anchorTwin layer design increases protectionHardened steel constructionFor indoor and outdoor useIncludes Anti-Tamper bearingsPerfect for use with heavy duty chains and locksThe Bike-It Bolt-In Ground Anchor has a two layer hardened steel construction which has been designed to be fixed to concrete by four M10 expandable bolts with Anti-Tamper bearings. The twin layer used in the product design increases the protection and security available.This Ground Anchor can be use indoor or outdoor, and is perfect for use with heavy duty chains and locks.