Double relief angle reduces tooth stress for long life. Precision forming process creates sharper teeth for fast cutting, Metal, scroll cutting reciprocating blade. 5/16" x 3-5/8". Packaged 5 blades per plastic pouch. No. 48-00-5161: Length: 3-5/8 In., Teeth Per Inch: 10 TPI, Type: Scroll Cutting Metal, Material: Bi-Metal, Application: Metal, Scroll, Pkg Qty: 5, Package Type: Clamshell No. 48-00-5162: Length: 3-5/8 In., Teeth Per Inch: 14 TPI, Type: Scroll Cutting Metal, Material: Bi-Metal, Application: Metal, Scroll, Pkg Qty: 5, Package Type: Clamshell No. 48-00-5163: Length: 3-5/8 In., Teeth Per Inch: 18 TPI, Type: Scroll Cutting Metal, Material: Bi-Metal, Application: Metal, Scroll, Pkg Qty: 5, Package Type: Clamshell No. 48-00-5041: Length: 6 In., Teeth Per Inch: 4/6 TPI, Type: Scroll Cutting Metal, Material: Bi-Metal, Application: Fast Scroll Cut,Circles,Nail-Embed Wood, Pkg Qty: 5, Package Type: Clamshell