This is a double-height external L-shape corner connector for 40×40 T-slot aluminum profiles, designed to provide a stronger and more stable joint than the standard single connector.
Perfect for building rigid frames, enclosures, CNC or printer bases, and other heavy-duty modular structures.

Features:

🧱 Dual-layer design — fits two 4040 profiles stacked vertically (or one 8040)

🔩 Friction-fit connection — holds firmly in the T-slot grooves without screws

⚙ Precise, rounded geometry for consistent fit across T-slot brands (Bosch, Item, Motedis, etc.)

🖨 Prints flat on the bed, no supports needed

🔧 Ideal for strong right-angle structural joints and modular extensions

Tolerances are tuned for a snug fit on standard 4040 profiles. If needed, adjust ±0.1–0.2 mm for brand-specific extrusions.