The SP150 is a single-rod, diamond-grit blade sharpener that can hone knives, scissors, fishing hooks, and so on. The sharpener is diamond coated and features some different sharpening surfaces. Those surfaces include a flat surface and a round surface. The rod is retractable with a twist release function. The checkered aluminum body is durable, and the included pocket clip makes storage easy.With Coast's commitment to quality, the SP150 Sharpener is backed by Coast's lifetime warranty against defects in materials and workmanship.