ITEM NAME:6Pcs Tungsten Steel Burr Drill Bits Grinder Rotary Tools For Diy Woodworkin N6J2 6Pcs Tungsten Steel Burr Drill Bits Grinder Rotary Tools For Diy Woodworkin N6J2 Uses: Suitable for micro-carving on olive core, beads, wood, bones, etc. Shape: Straight Blade Mandrel Shank: 2.35mm Color: silver + blue Material: tungsten steel Model size: 0.8mm Size: total length 45mm,front end 9mm,shank length 36mm Package Contents: 6 x rotating slanting needles 1 x storage box