Swan-Morton Retractable Trimming Knife and Blades A professional heavy duty trimming knife that offers easy blade changes on the various shaped surgical style blades it can hold. It also benefits from a retractable blade that uses audible clicks to indicate mid and rear safety positions.Knife Handle Swann-Morton PCABS Retractable Craft Knife, 154 mm = RS Stock no:847-7647 Blades are not includedCompatible Blades SM 01 = RS stock no:847-7641 SM 02 = RS stock no:847-7650 SM 03 = RS stock no: 847-7653 SM 04 = RS stock no:847-7657 SM 01B = RS stock no:847-7666 SM 03B = RS stock no:847-7669Blade Features & Benefits Blades are heavy duty carbon steel surgical style Blades are individually wrapped in V.P.I paperWarning You must be over the age of 18 to purchase this product