Fast, Simple, Accurate: The self-centering dowel gauge arms are an ever-reliable parallelogram that always finds dead center. Simply align the precision notch on the center bar of the fixture with the dowel position marking on your board, hold the fixture, and drill Spring Clamp: This portable fixture has a longer fence that makes clamping easier. It also has a ruler on the side of the fixture, drilling template to allow for faster fence adjustment; Fence allows for front-to-back depth adjustment; Fence is slotted to align dowel pins Reduce Woodworking ErrorMetal bushings of metal bushing drill guides ensure precise alignment when drilling for perfectly positioned dowels, drill guidance; table clamp Minimal construction with no exposed or covered mechanics Drill stand: With the handy carpentry, you can work more comfortably for woodworking; drill grinder; It is a great tool for furniture factory and woodworking enthusiasts Simplify drilling work: Quick dowel gauge, drilling aid that will center on boards to create quick connections and dowels to create edge connections and T-joints Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.