As an enthusiastic woodworker I purchased this router bit template for mortising woodworking projects. Industrial and scientific, this TOOL delivers accuracy and efficiency to my work.As a result of my tests, I determined that it carves a precise mortise in no time. the template diameter is adjustable, allowing for various wood thickness. The only real criticism is that the locking mechanism could be sturdier. However, it`s still a great addition to any cutting tools collection..