The R Nishijin folder is a special edition knife from 2012. It is based on the original C67 "R" model that Spyderco released in the 1990s. The original "R" had a handle and blade that looked like an Erector Set, with holes and cutouts. However, the new Sprint Run "R" variant has a solid blade and handle.
The blade is made of VG-10 steel and has a full-flat grind. It features jimping, which are small grooves, on the spine and the bottom finger choil. This provides better grip and control when using the knife. The handle has a back lock mechanism and is made with skeletonized steel liners. It also has scales made of Japanese Nishijin glass fiber.
The name Nishijin refers to a specific weave pattern used in the production of silk Kimono cloth. In this case, the glass fibers are woven together in a geometric pattern and then infused with a polymer base. This creates a lightweight and incredibly strong handle material. The Nishijin scales have a three-dimensional appearance, making them visually appealing.
Overall, the R Nishijin folder is a high-quality knife with a unique design and excellent performance.