Easy to install, the Spira-Lock® ground anchor penetrates most ground conditions, dealing with obstructions such as tree roots, small bricks and stones and can easily be removed and re-used (removal tool included). Locating pegs ensure accurate installation. Spira-Lock® kit for 2.5m shelter: 3.6kg (per 4 anchors); for 4m shelter and all premier curved team shelters: 4.4kg (per 5 anchors) )