I used this product to separate my garden from the lawn (hoping to keep weeds and grass from invading). I used the 10\" edging, placed up against the fence. I dug the barrier using a pickaxe and coaxed the edging up against the 4x4 with furring strips and 2\" wood screws. I think the thickness of the edging is ideal (if it were thicker, I might not have been able to bend it around the 4x4s). Time will tell whether it warps (as others have noted), but most of the material is now underground and it's held in place.