magnetic corner clamp 3d model

Functional CAD-style 3D model of a magnetic L-shaped corner clamp for cardboard box assembly. Exact 90-degree angle, compact precision tool, 60 mm arms, 20 mm width, 8 mm total thickness, 20 mm support walls, internal hidden cavities for four 10 mm x 3 mm neodymium magnets inserted during pause at print time, no visible magnets, no decorative elements, smooth planar surfaces, technical geometry, realistic manufacturable object, clean industrial design, high precision, prototyping-ready.