Matched set of Shimano Tiagra FC-4403 road or touring bike 170mm cranks.  Standard square taper.  Size is 170mm.  130-BCD. Original round 52/42/30 chainrings.  9/16 X 20T pedal threads (English).  Threading and tapers in good shape. Some normal rider wear, work great.  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 at $13.00 in the continental U.S. Buyer to pay within 7 days. International shipping by eBay International Shipping Program.  Thanks!