Horex-Protractor-Angle-Setting-0-180-Link-Length-120mm-Horex-2406-512-The-Horex-Protractor-Angle-Setting-0-180-Link-Length-120mm-has-been-designed-for-accurate-angle-measurement-&-features-clear-readable-scaling-the-quadrant-diameter-is-80mm-in addition-incorporating-several-excellent-features-including-a-locking-screw-&-manufactured-with-special-steel-satin-chromed-Horex-2406-512-Protractor-Angle-Setting-0-180-Link-Length-120mm