Green Lee-170XL-Cable-Tester-&-Fiber-Optic-Visual-Fault-Finder-Greenlee-52022371-P-The-Greenlee-170XL-Cable-Tester-&-Visual-Fault-Locator-is-an-indispensable-tool-for-quickly-identifying-bending-losses-&-breaks-in-optical-fibres-If-a-fibre-is-bent-too-tightly-the-red-laser-light-will-be-seen-escaping-through-the-cable-jacket-Likewise-if-a-fibre-is-broken-escaping-light-will-be-visible-where-the-break-is-located-P-P-Connectors-are-also-easily-tested-using-the-170XL-visual-fault-lo