Sometimes you need to add just a little bit more to the standard Quick Support Rod heights. For example, you may need an extra set of hands to install new kitchen cabinets. The T74505 Short Quick Support Rod is too short, the T74500 Medium Quick Support Rod is too long. So now what. The TASK QSR 18 in. Extension adds just the right amount to the Short Quick Support Rod for upper cabinet installation. The extension can be used with any Quick Support Rod in seconds. To install, simply unscrew the bottom (brass threaded) foot and attach the 18 in. extension. You can even layer them, using 2 or more extension rods together. (Please note: We do not recommend this for angled or horizontal applications as load capability on non-vertical planes has not been tested) 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. Our load-bearing Quick Support Rods come in 3 sizes: Short (30 in. to 54 in. T74505 ), Medium (63 in. to 120 in. T74500 ) and Long (83 in. to 159 in. T74490 ).