The General Tools and Instruments 520 Adjustable Trammels draw large circles and measure sizable distances with the accuracy of a dividerFine adjusting screw sets points accurately; points are removable and may be replaced with the pencil holderDie-cast bodies with hardened and grounded steel3-Inch (76mm) needle-point legs; clamp opening for beam is 3/8-Inch x 3/4-Inch(10 x 19mm)Trammels conform to government specifications GGG-T-661bThe General Tools and Instruments 520 Adjustable Trammels draw large circles and measure sizable distances with the accuracy of a divider. Fine adjusting screw sets points accurately. Points are removable and may be replaced with the pencil holder. Die-cast bodies with hardened and ground. 3-Inch (76mm) needle-point legs. Clamp opening for beam is 3/8-Inch x 3/4-Inch(10 x 19mm). Conforms to government specifications GGG-T-661b.
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Brand: General Tools, Model: 520, Color: DieCast Steel