Professional-grade roller frame features a sturdy, five-wire cage and polypropylene grip. The five-wire cage with a 90-degree angle is made of 5/16" chrome-plated shanks vs. thinner 1/4" shanks and offers a more substantial construction. Design also includes a 90-degree angle and nylon endcaps for smoother rotation. Polypropylene threaded grip is quick-connect compatible so you can use it with the Quick Connect Extension Poles (sold separately).