The Jonard Tools Microduct Scoring Tool is perfect for scoring and ringing 14/10 and 16/10 fiber optic microducts without damaging the fibers inside. The unique design allows you to score and ring 14/10 and 16/10 fiber optic microducts without any adjustments to the tool. This scoring tool is perfect for microducts 5 mm-16 mm (0.20"-0.63") in diameter with a wall thickness of 1.5 mm-3.0 mm (0.059"-0.118"). The tool incorporates wide jaws curl around the microducts, holding them in place while scoring. A spring-loaded butterfly clip makes it easy to open and position it perfectly on microducts. This tool also includes the FS-1416RB blade but also compatible with FS-1080RB blade for 10/8 and 12/10 fiber optic microducts.