8" 18t recip blade. Tough, flexible steel back and Matrix II steel with 8% cobalt cutting edge give maximum durability. Angled shank for faster cutting. 1/2" universal shank. Packaged 5 blades in reusable, sliding plastic case. Type: Straight Back, Material: Bi-Metal, Blade Length: 8", Teeth Per Inch: 18 TPI No. DW4843: Type: Coarse Carbide Grit, Material: Carbide, Blade Length: 8" No. DW4844: Type: Coarse Carbide Grit, Material: Carbide, Blade Length: 6" No. DW4845: Type: Straight Back, Material: Bi-Metal, Blade Length: 6", Teeth Per Inch: 10/14 TPI No. DW4846: Type: Straight Back, Material: Bi-Metal, Blade Length: 8", Teeth Per Inch: 10/14 TPI No. DW4847: Type: Taper Back, Material: Bi-Metal, Blade Length: 6", Teeth Per Inch: 5/8 TPI No. DW4848: Type: Taper Back, Material: Bi-Metal, Blade Length: 9", Teeth Per Inch: 5/8 TPI No. DW4849: Type: Taper Back, Material: Bi-Metal, Blade Length: 12", Teeth Per Inch: 5/8 TPI No. DW4850: Type: Straight Back, Material: Bi-Metal, Blade Length: 6", Teeth Per Inch: 6 TPI No. DW4851: Type: Taper Back, Material: Bi-Metal, Blade Length: 6", Teeth Per Inch: 6 TPI No. DW4860: Type: Taper Back, Material: Bi-Metal, Blade Length: 12", Teeth Per Inch: 6 TPI No. DW4862: Type: Taper Back, Material: Bi-Metal, Blade Length: 6", Teeth Per Inch: 6 TPI No. DW4863: Type: Taper Back, Material: Bi-Metal, Blade Length: 9", Teeth Per Inch: 6 TPI No. DW4864: Type: Straight Back, Material: Bi-Metal, Blade Length: 6", Teeth Per Inch: 10 TPI No. DW4865: Type: Straight Back, Material: Bi-Metal, Blade Length: 9", Teeth Per Inch: 10 TPI No. DW4866: Type: Straight Back, Material: Bi-Metal, Blade Length: 6", Teeth Per Inch: 14 TPI No. DW4867: Type: Straight Back, Material: Bi-Metal, Blade Length: 6", Teeth Per Inch: 18 TPI No. DW4868: Type: Straight Back, Material: Bi-Metal, Blade Length: 9", Teeth Per Inch: 14 TPI No. DW4869: Type: Straight Back, Material: Bi-Metal, Blade Length: 9", Teeth Per Inch: 18 TPI