The TASK Quick Support Rod (QSR) is available in three sizes: Short (30-54), Medium (63-120) and Long (83-159), plus an optional extension to suit numerous applications such as drywall, cabinetry, paneling, crown moldings, HVAC, dust barriers, temporary supports, and more. Its your extra set of hands while on the job. The patented adjustment and locking mechanism makes QSR the toughest and most versatile support rod on the market. The micro-adjustment function works by twisting the rod body to add or reduce length using the reverse threaded feet. With a vertical weight capacity of 132 lbs for the Short Quick Support Rod (T74500) and Medium Quick Support Rod (T74505), as well as a vertical weight capacity of 66lbs for the Long Quick Support Rod (T74490). For over 50 years, TASK Tools has manufactured professional grade tools to contractors and homeowners alike. The patented TASK Quick Support Rod System provides an extra set of hands wherever they may be needed.