Brand: STANLEY Features: Edge is engineered to withstand the rigors of cutting today's heavy and thick roofing materials 75% stronger than STANLEY's 11-983 Hook Blade, resulting in fewer blade changes Cuts roofing shingles, felt paper, Tyvek®, foam board, insulation, shingles and other building materials Designed for use in fixed blade knives only "ROOF" call-out is laser etched on blade to help prevent accidental mixing with standard blades.