The P9 line of 90o infinite position folding handles is designed for networking, telecommunication, computer, electronics, industrial, and other enclosures. An internal threaded version provides an ergonomic handhold that folds down to 13.3 mm (0.52 in.). The external threaded version, which folds down to 7 mm (0.27 in.), allows for greater clearances in crowded environments. There is more than an inch of space between the fully extended operating position and the folded storage position. Built-in friction in the pivoting handle is designed to prevent rattle and keep the handle in its desired position. Interior or exterior threads fasten from the inside of the enclosure to ensure a clean look on the exterior of the door. The externally threaded version, which is available in M4 and 8-32 thread sizes, accommodates panel thicknesses up to 8.4 mm (.33 in.). This model includes zinc-plated steel nuts and lockwashers. Engineers can enable the interior threaded model to accommodate a wider variety of panel thicknesses by fastening the device with M4 or 8-32 machine screws that are 5 mm (0.20 in.) longer than the panel thickness. Measuring 6.4 mm (0.25 in.) in diameter, the handles consist of anodized aluminum with a clear or black finish. However, steel and stainless steel versions are also available. Engineers can choose from four standard lengths ranging from 40 to 128 mm (1.57 to 5.04 in.) The external threaded model accommodates a maximum static load of 400 N (90 lbf), while the internal threaded version accommodates a maximum static load of 600 N (135 lbf).