This tool is an invaluable aid to the boat builder, carpenter and cabinetmaker. It is used to transfer the contours of one shape onto another. It can be used with two pencils for double scribing, or with the hardened steel pin on one leg for single scribing. This scribe is fully adjustable from 0" to 12" and is calibrated so that any opening can be used once the bi-directional bubbles are set. The double level vials can be adjusted and locked in any position on both axis, an uncommon feature in transfer scribes. With 16 raised notches at each leg end, the pencil and pin orientations are limitless. The cast metal body is non-corroding and has brass fittings. It comes with an extra-hard indelible pencil