These pen kits are designed for 8mm drill bits, usually wood turning sizes, adding convenience and flexibility to your wood car practice, and you can also learn about the specific size of the pen kit from the picture The thin line pen set for wooden car is ideal for beginners who want to join the world of woodworking; you can make exquisite pens for personal use or as personal gifts to your loved ; versatility opens up many possibilities to turn ordinary wood pieces into 18 fine pen kits to you have the ability to fully explore your hands-on potential; we believe that a sufficient supply can promote better, uninterrupted out of your beautiful projects Use our pen turning kit made of high-quality metal to indulge in the world of wood carts; rugged, this gold pen kit provides stability and smoothness to your handmade experience, ensuring your masterpiece confidently stand the test of time Please note that only wooden turning pen turning kits are included in the package, excluding lathes, shafts, drills, bushings and wooden blanks, Manufacturer: Jnchdghwa