Jasper Precision Tools 200 PRO LTD ED Router Circle Guide Jig M200 Pro Black Jasper Precision Tools 200 PRO LTD ED Router Circle Guide allows for the creation of precision circles ranging from 2 1/4" to 18 3/16" in diameter. This professional-grade jig is calibrated for use with a 1/4 inch router bit and features a clear, easy-to-read scale for accurate adjustments. Designed for woodworking enthusiasts and professionals alike, it includes the necessary mounting hardware and is crafted for durability and ease of use. Measurements: • Length: 12" • Width: 6.5"