These re the slotted corner bricks that hold 2x6 inch boards (whatever length you want) to form raised garden beds or other enclosures (these were used for baby tortoises). I have 12 corner bricks to make a 3 board high (18 inch) planter/enclosure. They have holes for rebar to really hold them together (which I found unnecessary). Selling these for $1.00 each (a savings of 75%). Look 'em up on Home Depot. Wood not included.