This quality mounting anchor can be fixed to the wall as well as to the ground. Its 16mm thick shackle made of specially hardened steel offers the greatest resistance. If you combine this device with an ABUS lock, you are taking excellent precautionary measures to prevent your bike from being stolen.In fact, the GRANITâ„¢ WBA 100 Wall/Floor Anchor is so strong when installed properly, that its use in rental properties should be discussed with landlords in advance. Once installed, it can only be removed with considerable effort â€“ and this is a good thing. 5/8'' thick shackle made of hardened special steel for maximum resistance. Incl. mounting accessories.