The QB2 Kit is the fastest and easiest way to mount solar panels to a variety of roofs. Sealant is optional, and the kit has impressive leak-proof water test results, including no leakage under ASTM E331 @ 15.00 psf, ASTM E331 (modified) @ 30.00 PSF for 120 minutes, and ASTM E2124 (modified) with a 6" water column for 7 days. The dual drive system allows the use of either a standard 1/2" hex or a 6MM hex insert bit. To properly compress the MicroFlashing® with the QB2, a minimum torque of 150 Lbs/Inch is required. The 10MM x 46MM rail slot accepts 5/16" or 3/8" bolts and is compatible with rail and most railless systems, including Snap N Rack, Unirac, IronRidge, and Eco Fasten. Installation is straightforward with the simple drill, seal, and mount process. Patent #8448407 ensures reliability and innovation.