Fixed angle 90-degree - 6-inch platform For use only as Slideguard or Material Support on low slope roofs Commercial grade 11 gauge steel construction - Heavy duty riveted construction Unit has slots for easy installation & removal without damaging the shingles Durable all-steel construction roof brackets with 6-inch platform. Use with 2-by-6-inch planks. Easy installation and removal without damaging shingles. Maximum 8 feet of spacing between brackets. Complies with OSHA regulations. Fixed angle 90-degree, 6-inch platform. For use only as Slideguard or Material Support on low slope roofs.