https://www.jwwinco.com/en-us/products/3.8-Adjusting-Conveying-Moving-with-Telescopic-Slides-Guides-Spindles-and-Ball-Rollers/Guide-Rollers-Cam-Roller-Linear-Guide-Rail-Systems/GN-1490-Steel-Cam-Roller-Linear-Guide-Rail-Systems-Formed-Rail-Profile
Cam Roller Linear Guide Rail Systems GN 1490 | JW Winco
Four-hole aluminum base clamps ensuring stable base attachment and alignment
guide rail systemscamrollerlineargn
https://www.assaabloy.com/az/en/solutions/products/door-hardware/door-closers/guide-rail-systems
Guide Rail Systems | ASSA ABLOY
Doors equipped with Cam-Motion door closers are easier and more comfortable to open. They require less effort for everyone who passes through them.
guide rail systemsassaabloy