The Alvin Jet-Bow Beam Combination Drawing Set is a perfect collection of drawing tools for many drafting needs. it contains a six-inch speed compass with replaceable needle points and a 4 ½-inch bow pencil compass. Both compasses can be used as dividers with interchangeable pen, pencil, and divider parts.
This drawing set is designed for creating circles up to 28-inch in diameter. It comes with a six-inch extension beam bar and slide coupling that allows drawing of larger circles with accuracy and precision. It also includes a six-inch friction divider that is equipped with a self-centering gearhead and replaceable needle points.
To complete the package, the Alvin Jet-Bow Beam Combination Drawing Set provides a mechanical lead holder and a small lead pointer. With spare ruling pens and a slip handle, it accommodates most inking applications. It is also supplied with a replacement compass lead tube and a screwdriver for tension adjustment. Packed in a transparent, hard, plastic case for convenient storage, it is portable and easy to carry anywhere.