1) For all beam extrusion
2) It is better than german tension lock
3) Suitable for 4.3mm groove

1) For all beam extrusion
2) It is better than german tension lock
3) Suitable for 4.3mm groove system or the other groove system
4) Has patent, guaranteeing 3 years against manufacture defect
5) We can offer you the authoritative testing report.

6) This kind of tension lock has patent:

  invention patents - 99113438.9
  utility patents - 99225584.8
                      - 00221828.3