Use these versatile corners to create everything from multi-level raised beds to angled landscape edging. Use singly for 5-1/2" high beds or edging, or stack two corners for an 11" high bed. Use with standard 2 x 6 lumber (fastening screws are included) or our Composite Lumber, sold separately. Stake-in-stake design allows for easy stacking Hinges can form angles from 60?? to 180?? 11-in. high, including ground spike Made of high-impact, frost-proof plastic