Concord Blades LSDC120C05HP 12 Inch Fire Rescue/Roof Cutter/Demolition Diamond Blade 5.5 mm segment height, .250" segment width & 1"-20 mm Arbor Use Dry/Wet Cuts Drywall, Wood Decking, Corrugated Roofing, Shingle Roofs, Insulation Materials, Fire Doors, Sheet Metal, Auto Body Panels, Tires, Plastic, Railroad Ties, Tree Roots & Timber, Cinder Block, and more