Freud DS0914BGP5 9-Inch x 8-14T Demo Demon Diablo Reciprocating Blade, 5-Pack Permashield coating protects the blade from heat, gumming and corrosion 1 in. Demolition body for straighter cuts with less vibration Ultra-hardened cutting edge for up to 5x longer life than standard blades 9" Length 8/14 Teeth per Inch (TPI) 4x Better Performance Than The industry Standard Blade Special Coating to reduce Friction and Heat Build Up High Quality Reciprocating Blade. Ultra Hardened Bi Metal Teeth. Plunge Tip Design