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Double Prism Optical Square for Right Angle Layout & Perpendicular Line Setting, Portable Penta Prism for Surveying & Construction

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US$26.39 cheaper than the new price!!

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Product details

Management number 210923819 Release Date 2026/04/04 List Price US$17.60 Model Number 210923819
Category
  • DJ-2 Double Right Angle Penta Prism is used for determining 90° sightings. Comprises of two penta prisms of quality optical glass in sturdy aluminium housing. The accuracy of a right angle set with the optical square is approximately ±1cm at 30m. Used for: placing points on line, setting out curves, offset measurements, determining the horizontal and detail plans.
  • Featuring two precision prisms, this Double Prism Optical Square supports simultaneous left/right right-angle and straight-ahead viewing. It shows both baseline and perpendicular line at once, no assistant needed—more efficient than single-prism tools.
  • Effortless Right Angle Layout, Easy Perpendicular Line Setting
  • Durable optical glass prisms and sturdy housing suit outdoor use. Lightweight with ergonomic grip, compatible with plumb bobs for stable, accurate positioning
  • Essential for surveyors, engineers and landscapers. Fits right angle marking, curve staking and calibration—reliable for precise 90° measurements in all construction projects Used for determining 90° sightings.

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