The Alvin Combination Universal Speed-Bow Set is a collection of various drawing instruments perfect for all drafting needs. It features a six-inch compass with a center wheel and a universal spindle mechanism that allows smooth, quick, and accurate adjustments from 1/8-inch up to 12-inch diameter. With its double break leg design, it is excellent for drawing large circles with ease and precision. An extension beam bar provides additional circle diameter and can create circles with up to 21-inch diameter.
This combination speed-bow set is equipped with a four-inch pencil compass/divider and a six-inch divider with adjustable and replaceable needle points. For additional functionality and versatility, it includes a screwdriver and a spare parts tube for tension adjustment and a technical pen adapter to accommodate inking applications.
To complete the package, the Alvin Combination Universal Speed-Bow Set also comes with a 0.5-millimeter fineline pencil that is supplied with a replacement lead tube for future use. It is packed in a sturdy transparent plastic case for easy transport and convenient storage.