Constructed of hardened stainless steel. Blade length is 8" with a diameter of 5/8". * Razor sharp teeth that cut 10 times faster than similar shaping tools. * Use like other round files & rasps to enlarge holes & shape inside curves. * The round blade comes equipped with a Santaprene handle for added stability. * Cuts cleanly with little effort & leaves the worked surface smooth & ready to sand.