The only set to use if you are making joints in plywood. Since plywood thickness tends to be thinner than nominal dimensions, CMT offers you a way to work around the problem - our Plywood Groove Set includes three specifically selected bits designed for making clean grooves and dadoes for accurate fitting joints. Use our 23/32 bit for 3/4 thick ply, 31/64 bit for 1/2 ply and our 15/64 for 1/4 ply. No gaps or sloppy joints, guaranteed. Available with 1/2 or 1/4 shanks.