Vintage Shimano 105 Triple crankset, model FC-1056/1057, silver aluminum square taper road bike crank arms.

Set includes both right and left 170 mm arms with integrated five-arm spider for double chainrings and installed chainring spacers; chainrings and fixing bolts are not included.

Spider uses a 130 BCD pattern as indicated on the chainring guide in the photos.

Back of arms stamped SHIMANO 105, 170, FC-1056/1057, VIA JAPAN; pair weighs 515 g on the scale shown.