Trammels accurately measure and mark distances that are too great for conventional compasses and dividers. Trammels will accurately transfer measurements, scribe arcs and lay out circles. Points can be replaced with pencils, ballpoint pens, crayons or soap- stone sticks for marking various materials. Fits most rulers 1/2'' to 1-1/8'' wide.
Ruler is not included.
To insert lead, open the collet by the tip and pull the small metal scriber point out, you will find the lead stored in the housing of the handle. Open the housing by unscrewing the handle and removing the black cap inside of the handle. Remove the lead, carefully insert the lead into the head and tighten collet.
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