Narex 6 mm 1/4" Round Cabinetmaker Wood Rat Tail Coarse Cut Rasp 872511 Made by a highly respected tool manufacturer in the Czech Republic and is of exceptional quality Blade is 6 mm (1/4) in diameter and 150 mm (6") long. Overall length is 295 mm (12") Coarse cut pattern with 20 teeth per square centimeter The blade is made from tool steel and then hardened to RC 45. Blades are CNC stitched which produces a uniform tooth pattern for even stock removal