Various size from 1 / 8 " to 1 / 2 " square, with engraved size markings for quick and accurate measurements ensures durability without causing damage to and routers during use Perfect for woodworking projects that demand measurements, these block consistent professional your woodworking with this set of height gauge tool, offering convenience and efficiency in your Suitable for woodworkers and enthusiasts a tool for setting fence and cutter accurately, Manufacturer: Tsophreniq