This SAS ground Anchor is Sold Secure Silver approved and ideal for securing camping trailers or small utility trailers for longer term storage. When coupled with a hitch lock and wheel clamp you can rest assured your investment is safe. Can be coupled with Smaller SAS General Purpose Chains and all cables. The anchor has been attack tested and bolts down securely to floorrs or walls, concrete or brick. The bolts can be covered by a ball bearing making them anti drill. When using a chain, the compact design means they are innaccessable so giving double security. THe fixings are supplied in the set as well as an allen key to fit.