1. Hole sizes: This insert and tenon cutter has 19 hole sizes on the positioning plate, ranging from 1/8 inch to 5/8 inch in steps of 1/ inch. Thanks to the wide range of options, you can create tenons in different diameters to meet the requirements of every woodworking project. 2. Practical design: Steel dowel plates are carefully designed with two exit holes and two grooves. This practical feature makes it easier to attach the positioning plate to platforms or workbenches with integrated holes, thus increasing the efficiency and of the user. 3. 19 holes: The spike maker is made of steel with a hardness of 59 to 61 HRC, which not only ensures durability but also longlasting performance that withstands the daily rigors of heavy work in woodworking and other applications. 4. Robust and durable: The spike cutter is made of steel for long durability. Its sturdy construction and hardened materials maintain strength and integrity even under heavy use, making it a reliable tool for both professional woodworkers and hobbyists alike.