Concave Radii Scraper Set consists of two scraper blades with 10 convex profiles. Each profile is accurately machined starting at ¼˝ and continuing through 1¼˝ in 1/8˝ increments, with an additional 1½˝ profile. They are made from high quality European saw steel heat treated and tempered to Rockwell 48-52 and are ideal for the shaping and finishing of wood moldings and for other scraping applications. For best results, burnish edges prior to use. Thomas Flinn & Co. has been providing high quality saws including the Pax Brand which was established in Sheffield in 1776. They pride themselves on having modern technology combined with skilled traditional hand craftsmanship.