1. Suitable for wooden,glass and aluminum etc,all kinds of doors 2. Max opening angle in each direction:130? 3. Controllable Closing Angle:90?25?0? 4. Inside the frame:Height can be adjusted within 4mm, Width can be adjusted within 5mm between left and right length can be adjusted within 12mm 5. Opening or stopping position:90? 6. It operates normally from -30?to 45? 7. Pass the quality test of 500 thousand cycles