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Alvin Computing Trig-Scale Adjustable Drafting Triangles

Alvin adjustable drafting triangles with computing trig-scales feature 3 sets of graduations showing rise and slope from 0 to 90 degrees. Desired angle is locked into position with a thumbscrew for accurate drawing. Strong 0.120" thick acrylic plastic is shatterproof light blue, optically clear. Inking edges on all 3 sides. Available in 3 sizes as shown. Alvin LX-series adjustable drafting triangles include detailed instructions.
Alvin 8" Computing Trig-Scale Adjustable Triangle
Price: $27.65
Sale Price: $17.77
You Save 36%
Alvin 10" Computing Trig-Scale Adjustable Triangle
Price: $31.70
Sale Price: $19.23
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Alvin 12" Computing Trig-Scale Adjustable Triangle
Price: $35.50
Sale Price: $22.00
You Save 38%
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