3/8” x 3 tpi blades are generally used for gradual curves and straight-line cutting in 6”-10” hardwoods and 5”-8” softwoods. They can also make a 1-1/4” radius cut.

The 3/8” x 4 tpi blades are used for gradual curves and straight-line cutting  in 2-1/2”-6” hardwoods and 1-1/2”-4” softwoods.  They can make a 1-1/4” radius cut.  

3/8” x 6 tpi blades are used for grandual curves and straight-line cutting ¾”- 2-1/2” hardwoods and ½”-1-1/2” softwoods.  They can make a 1-1/4” radius cut.  

3/8” x 10 tpi blades are used for gradual curves and straight-line cutting up to  ¾” hardwoods and ½” softwoods.  They can make a 1-1/4” radius cut.  These blades give a smooth, clean finish for minimum sanding.