Berea Hardwoods Bushings 45A are precision-engineered round steel pieces designed to slide onto the mandrel between mounted pen blanks. These bushings are essential for turning wood down to the exact size needed, ensuring a fit for your pen projects. Each kit includes specific bushings tailored for different mandrels, identified by a letter following the bushing number, such as A or B. These particular bushings are compatible with the Tetra™ Stylus Pen Kit, making them a reliable choice for crafting high-quality pens with ease. Model Number: 45A