In my former life, I worked as a mechanic, in a paint and body shop industrial setting. So I have the nutsert tool and inserts (mirrors, etc). I just can't, for the life of me, understand why they would either use a) screws - short ones at that, maybe 1/2" or b) 1 1/2' long machine screws without explaining either one. I would NEVER use screws for this application. I will use the machine stuff with washers and nylock nuts from underneath. And nutserts from on top, if applicable. But I will cut the machine screws down to a managible level. 1 1/2" is nuts. NO BIG DEAL. Just know what you are getting if you order these. Just whacky stuff. I may even get some of those "theft proof" bolts to hamper thieves. I am just SO happy that THEY WERE NOT DESTROYED in shipping! I HATE UPS and FEDX because of their stuff they have pulled in the past. Absolutely HATE THEM BOTH. They have cost me many dollars, thousands of dollars, with no recourse. I HATE them. The jerk today left a message on my door. I instructed Dale's Cuda Shop that I would be at home and did not want to sign for the package - well, the jerk left a message that I needed to sign. I called up their office on the message, was assured that I didn't need to sign, didn't know why the driver didn't leave it. 15 minutes later the jerk shows up and made me sign for it anyway. THANK GOD IT WASN"T ALL SCREWED UP. Dales Cuda Shiop packaged it expertly, but I have had stuff packaged in PLYWOOD with forklift holes in it. I HATE UPS AND FEDX. The seem to go out of their way to f00k things up.