12-Piece Black Corner Bracket Set for 20x20 Extrusions
✔️ 12 durable PLA corner brackets with 5 M5 screw holes (2020)

These 12 corner brackets are designed for 20x20 aluminum extrusion frames. Made from PLA, they provide 90-degree connections for DIY 3D printer frames, lightweight indoor sign frames, or LED acrylic displays. Made in USA - no tariffs.

✅ 12-piece set for 2020 series aluminum extrusion cross corners
✅ 5 mounting holes for M5 screws on each bracket
✅ Black PLA offers lightweight, sturdy joints
✅ Connects two 20mm x 20mm rails at a 90-degree angle

💡 What is a corner bracket used for in aluminum extrusion systems?

A handy connector that forms strong 90-degree joints for 20x20 profiles.

- Handy for building DIY 3D printer frames and light sign frames

- Works with 2020 series extrusions and M5 screws

- Helps keep corners square under load for durable setups