Quick Stack System: With the patented Quick Stack System (QSS), portability is the key feature. Clip the stands together and save a lot of room in the studio, or carry them in a compact case to easily bring them with you for outdoor shooting. Stacking System Leg Lock: A stronger and more ergonomic handle makes it easier/assists to secure stands into the operating position. Locking Device: Push on the locking device and detach one stand, for quick usage Attachment: A 3/8-Inch screw top female to 1/4-Inch adapter male (015), allows you to connect additional accessories. Riser Lock Handle: A bi-injection casting provides the photographer with a better ergonomic grip