Square Taper Crank Arm, Drive Side ( Right ) are 5 Pin 50.4mm BCD aka 50 PCD. The Cranks with a W stamp in them are for common 9/16" x 20 tpi threaded pedals. The Cranks With Out a W stamp are French 14mm x 1.25 Thread pitch that is slightly smaller than common 9/16" Pedals.
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