My wife been going through Acute Myeloid Leukemia treatment and stem cell transplant. Very weak and nearly fell just trying to get into the house. Installed this and she is much safer going in and out down the two steps. The drill bit is grooved for a hammer drill and will not fit properly in a regular drill. I got a different bit which worked better for me. The brackets that hold the middle cross brace are not very strong, and are not made to tighten the nuts all the way down. Do not try to tighten these nuts all the way down. They are designed to allow the cross brace to adjust to the slant. If you over tighten these nuts, you will crack the brackets. The washers provided are not listed on the parts list, and they are not shown in the PICTURE install guide. They go into the main brackets BEFORE you tighten down the bolts. You’ll figure it out. Very good value and solid rail.