These Faithfull Coping Saw Blades are manufactured from high quality steel for strength and durability. The teeth configuration on coping saw blades is specifically designed to ensure smooth and fast cutting especially when making turns to follow contours, and cutting shapes. For use with Faithfull (FAICS) Coping Saw. The Faithfull FAICSB coping saw blades have the following specifications Application Metal cutting. Length of blade 165mm (6 1/2 inch). 14 TPI.