Long life tungsten carbide blade for thinner flexible materials such as folding carton, polyester film, leather, vinyl and paper. For use in the RM Knife tool. Length: 40mm. Cylindrical 6 or 8mm. Maximal cutting thickness about 6.5mm,single edge or double edge, 30 degrees angle BLD-SR6223, BLD-SR6310, BLD-SR6303, BLD-SR6312 BLD-DR8160, BLD-DR8180 Welcome to send inquiry to us, Nanjing Costar Precision Tools Co.,Ltd, a professional manufacturer of tungsten carbide blades.