About the OLFA 45mm Quick-Change Rotary Cutter (RTY-2/C): The OLFA 45mm Quick-Change Rotary Cutter is the answer for quick fabric cutting in all your sewing and quilting projects. This rotary cutter comes pre-loaded with an RB45 Tungsten Steel Rotary Blade manufactured from high-quality tungsten tool steel. It easily cuts through multiple layers of fabric and paper. The built-in blade cover enhances user safety. Compatible with OLFA's 45mm Replacement Blades (RB45-1). Perfect for fabric cutting or as a quilting tool. Designed for use on a wide variety of materials including fleece, felt, wool, cotton, leather, suede, foam, vinyl, and more. About OLFA: Ever since Yoshio Okada, the founder of OLFA CORPORATION, invented the world's first snap-off blade cutter in 1956, OLFA has been committed to developing practical and safe hand-held cutting tools.OLFA brand blades are made with top quality materials, forged with technologies that stem from traditional sword-making, sharpened with technologies that give a blade life, and ultimately finished with the craftsmanship that brings all of this together. The holders and handles that allow users to gain the full cutting performance of these high-quality blades are designed, developed, and manufactured in Japan and subjected to stringent quality checks throughout the process. OLFA is proud of the unwavering quality that goes into every product it makes.