Features: new and high quality Package Content: the package includes 3/8", 7mm, 8mm, and 10mm pilot shafts, 3/4" steel cutter & key Wrench & sleeve adapter. Offer Convenience: the pilot shafts in different sizes fit your needs in your life and wood working, which can increase the working efficiency and reduce the energy while drilling and milling Quality Material: the cutter shafts are made of solid carbon steel, which are rust resistant, durable with nice cutting strength for maximum drilling. Save Energy: the pilot shafts are suitable for mounting into a drill chuck, lathe chuck, drill press or hand drill, and they are helpful to polish the pen, mill the hole and clean the inner tube with the tiny size, and synthetic bushings allow you to access and finish the ends of your pieces easily unlike flush steel bushings, which is energy saving. Portability: This product is small in size and light in weight, which is very convenient to carry around. Specifications: Material:Steel Length:Approx.9.4cm/3.7inches Package Includes: 4 x Pilot cutter shafts 1 x Cutting head 1 x Sleeve adapter 1 x Key wrench note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.