9 PIECE BOOST BURS SET - Multipack with 5 pieces of pilot cutter shafts in different sizes, 2 cutting heads, 1 sleeve adapter and 1 hex wrench Quality material: cutter shafts are made of solid carbon steel, durable steel provides a clean cut at moment Suitable size: for pens that use 7mm, 8mm, 3/8", 27/64" and 10mm pilot shafts, 3/4", 70/127" cutting head and size 0 adapter Occasions: Pilot shafts can be used on a drill, lathe chuck or with a standard hand drill, the shafts will clean and remove any excess glue from the tubes. Cleanly remove excess glue from the rotated pen tube. and in, Weight: 0.49163084426 pounds, Manufacturer: Rtxbvg