48-01-5162High Performance Super Sawzall(r) Blades Matrix II high speed steel teeth with 8% cobalt, tough bi-metal design for the fastest cutting, longest blade life available. 1/2" universal tang.Teeth per inch: 14Length x Width x Thickness: 3-5/8 x 5/16 x .0355 blades per pouchRecommended use:Metal scroll cutting blades - Scroll cutting metal 1/8" thru 3/16".