I bought a set of Maxfli “Torque Arm” iron heads 1-9 PW1, PW2, SW, and corresponding 3 wood and 5 wood (sole says Maltby Inertial weight distribution.

Could you please tell me the inner and outer diameter of the hosel, both irons and woods (to know what shafts to get) and… why did Mr Maltby name them PW1 and PW2?

Also… if a 6 iron is 37″ long, would you recommend the 1 iron to be 39.5″?