Check out the following links
1. Hettich Sensys 8645i Concealed Hinge: https://biwholesale.com/product/hettich-sensys-8645i-concealed-hinge/
2. Hettich 3D Concealed Hinges For 40 mm Doors: https://biwholesale.com/product/hettich-3d-concealed-hinges/
3. Hafele Butt Hinge | SS 304 | 4″ x 3″ x 3 mm | 2 Ball Bearing: https://biwholesale.com/product/hafele-ball-bearing-butt-hinge-square-corner/
4. TAITON Wall to Handrail Connector for TRF-UTB-42: https://biwholesale.com/product/taiton-wall-to-handrail-connector-trf-utb-wc/
5. Godrej Multi Purpose Lock with Reversible Key: https://biwholesale.com/product/godrej-multi-purpose-lock-with-reversible-key-black/
6. Steel: https://en.wikipedia.org/wiki/Steel
