This is a great alternative when the ground's too tough to stake. The Sand Bag Stake secures and stabilizes your tent when you fill the triangle shape with 20 pounds of weight. And if there isn't any sand nearby, you can use rocks or snow if you want. Features Triangle shape for easy use Will hold up to 20 lbs of sand Specifications Weight: 3 oz / .09 kg (Each without sand) Length: 9 in / 23 cm Width: 9 in / 23 cm Height: 9 in / 23 cm Depth: 6 in / 15 cm Materials Material: 150D Polyester | Kelty Sand Bag Stake