The all new Construction Master Pro Trig Plus III feet-inch-fraction calculator will simplify the most complex design featuring a protective hard case, this powerful new Construction Master helps get the job done right the first time! From design and engineering to estimating and bidding, this easy-to-use tool can help solve any construction-math problem quickly, simply and accuately!

• Precise Angles Down to Degrees, Minutes and Seconds.
• Full Trigonometric Functions, Sime, Cosine, Tangent, Arcsine, Arccosine and Arctangent simplify complex design and construction math
• Rafters and Right Angles, Custom Pitch, Rise, Run, Diagonal, and Hip/Valley and Jack keys now instantly find lengths for: Common Rafters, Regular(45�) and Irregular( non-45�) Hip/Valley.
• Expanded Jack Rafter Functions.
• Enhanced Stair Solutions, Everything you need to layout yur next stairway with confidence: Risers, Treads, Stringer Length, Incline Angle and more.
• NEW! Backspace Key.
• NEW! Three Built-in Memories.
• Expanded Circular Solutions, Complete built-in solutions for Circumference, Area, Arcs, Segments, Chords, Radius, Segment Heights.
• Full-Size User's Guide.
• Exponential Notation Function.
• User-Set Preferences, Allows permanent setting of many user-defined options.
• Custom-Set Fractions.
• Board Feet Lumber Estimating.
• Fast Per-Unit CostSolutions.
• Weight-per-Volume Conversions.
• "Paperless" Tape, Quickly double-check your totals by instantly reviewing your last 20 entries.
• More Time-Saving Features.