These scroll saw are made of high-quality SK5 carbon steel, with high hardness and wear resistant, making them highly durable, precise cutting, rugged, and long-lasting. Scroll saw easy installation and easy handling, easy to use and highly durable. They can be used for precise sawing of hard/soft woods, plastic, copper and other soft metals. The precise polishing of saw teeth is designed to speed up the cutting process and improve cutting efficiency. Various tooth shapes are designed for fast or fine cutting, and different sizes of saw are suitable for cutting different materials. These scroll saw are suitable for machines that require 5 inches pin end . They are perfectly compatible with WEN 3921 3922 3923, compatible with TACKLIFE, compatible with Shop Fox, compatible with SKIL, compatible with Rikon, compatible with Sears Craftsman, compatible with Penn State, compatible with Ryobi SC165VS and all 15in and 16in. Superior Performance: Coping saw are made of SK5 carbon steel, anti-rust, high hardness, not easy to break, sharp, strong and durable. They can provide precise and clean cuts. Multiple Uses: Various tooth designs for fast or fine cutting, and different sizes of jigsaw have different purpose. You can choose the right saw blade according to the material you are cutting or the purpose of your work. Adequate Quantity: The package includes 48 pcs scroll saw blade with different TPI and purpose. Sufficient quantity to meet your daily needs and different cutting demands. Parts List: 12 x 10 TPI Saw 12 x 15 TPI Saw 12 x 18 TPI Saw 12 x 24 TPI Saw Product Name: Scroll Saw Size: 5 inches Quantity: 12 pcs 10 TPI, 12 pcs 15 TPI, 12 pcs 18 TPI, 12 pcs 24 TPI (48pcs in total) Colour:black Material:steel Package Contents: 1 set x Scroll Saw Blade Set Only the above pack