Korean 4" Handwheel for 1/2" shaft - heavy-duty crank handle vs 5" Handwheel for 1/2" bore, heavy-duty crank handle

Key Differences

Product A is a 4" handwheel with a 1/2" shaft bore and a slightly lower listed price tier; Product B is a 5" heavy-duty handwheel with the same 1/2" bore but larger diameter intended for machinery and table-saw parts. Pick A if you want the more compact 4" replacement at a lower price tier; pick B if you need a larger, heavier-duty 5" wheel for broader machinery use