This Gunville foam cutter set provides a broad range of foam fly tying options and includes a full set of 6 sharpened stainless steel foam cylinder cutters in a wide range of sizes. Drill out your own Booby Eyes, Atomic Ants and fly bodies from a foam block. Pre-sharpened and manufactured from stainless steel, these tools are built to last. Cutters 57mm long with cutting depth of 45mm. For use in a drill. Made in the UK. Set of 6 sizes, 0.11 inch (2.8mm) to 0.35 inch (9mm) diameter.