Manfrotto 1051BAC-3 6-Feet 9-Inches Alu Mini Compact Stand AC with 4 Section and 3 Risers, 3-Pack (Black) 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