Precision Ryoba 2-edge saws 

A Japanese Pull Saw is a handsaw developed in Japan that is thinner than a traditional western push saw and cuts on the pull stroke which keeps the cut straighter

Super-fine blades for precision carpentry cross-cut and reverse edge of blade for rip-cut.

lengthpart noKerfTPI Cross/rip)
120TRYO120S0.6mm22/22
180TRYO180N0.65mm17/9
180TRYO180W0.65mm17/9
210TRYO210S0.85mm17/8-12
240TRYO240S0.9mm16/7-10