A new innovation in self-closing frameless glass doors. The hydraulic closing mechanism fits into the patch fitting and allows for closing adjustment like a floor spring. No digging is required and installation is quick and easy.

Rotate clockwise to increase speed, counterclockwise to decrease speed

You can make some adjustments after installation. Adjust the position by using an Allen wrench. There are six adjustable screws on the base, so we can adjust 3mm left and right, 3mm front and back, and even make alignment adjustments.
link:https://www.heinda-cn.com/floor-spring/concealed-floor-spring/concealed-floor-spring-for-glass-doors.html