Berea Hardwoods 57A Bushings are essential components designed for use with pen turning projects. These round steel pieces slide onto the mandrel between the mounted pen blanks, providing the precise sizing needed for your work. To achieve the correct wood size, you will need to turn the wood down to the top of these bushings. Each kit includes specific bushings tailored for particular mandrels, with the letter following the bushing number indicating the compatible mandrel type, such as A or B. These bushings are specifically made for the Glacia Ballpoint Pen, ensuring a fit and smooth assembly. Model Number: 57A