Matched set of USED Shimano 105 model FC-1055 road, touring bike 172.5mm cranks. Standard square taper. Size is 172.5mm. 5 bolt cranks and chainrings, BCD is 130. Original round 52/42 chainrings. 9/16 X 20T pedal threads (English). Threading and tapers are in good shape. USED, these have some weathering on the crank arms, but work great, chainring teeth in great shape. I took a close up picture of the chainring teeth. Please check out the attached pictures, that's exactly what's included. Buyer pays shipping (delivery confirmation is included) at $11.00 in the continental U.S. Buyer to pay within 7 days. International shipping by eBay Global Shipping Program. Thanks!