I used the advice and used a pneumatic brad nailer and that made it easy. Be sure they are straight and screw/nail as you go. I had to cut them for my purpose and it was a pita to get the ends to accept the covers if you have to cut them. You will need a small file.The covers go on OK if you have patience and start from one end and work your way down. The channel is very thin and will bend easily if you hit it with something. In my case a chair leg.They look nice and it made my project a hit.It's expensive for what it is. I could fabricate something cheaper maybe but time is money.These v shaped channels are great. The black looks great against the ceiling. What you will find maddening is there are only inside corners and no outside corners. You have to cut perfect 45 degree outside corners for your lights. Without the 270 degree outside angles it certainly looks less professional and the races as well as the corners are in my opinion overpriced since the outside corners don't exist and you have to buy more expensive hardware to splice them together. I also bough a special hand saw to cut the aluminum which has worked great.Good track for the value.If installing on anything other than wood, you will need different screws, as others have mentioned.These work great and look nice even in the daylight and at night makes the individual lights seem to be a solid light. My only complaint would be they should give installation suggestions. Use the clips to connect them together but don't screw the clips into the house ... its too easy to make the clip out of alignment with the others. And the end clips that have little holes in them, the holes are too small to get any connector through. I had to cut a channel to the edge to get cables through them.The product is nice, but I lost the end caps and I'm looking to order replacements, but no one has responded to my request yet.They’re fine for what they are but if u have walls that aren’t perfectly sized you’ll have to cut the channels and after that they were a pain to line up, and if they don’t line up perfectly good luck putting in the semi clear diffuser plastic cuz it’s a pain to snap in and sliding it takes so much force I felt I was gonna break it. Overall it got the job done but required more work to get them to do that job than I was expecting. Oh and final note, hated the L shaped clips, they didn’t hold the channels at allDidn't really use this how it was intended but worked great for my DIY attempt at a corner led light. I will say however that they could have been packaged better they were thrown in a box luckly they made it thru ok. The one i used for the light i noticed had a small dent, nothing super bad but haven't used the rest yet.Also there are metal shaving in the plastic. This could have been cut or cleaned better before packaging. You have to make sure to remove them without getting the shavings everywhere or scratching the coating. It didn't affect my project but you'll have to be careful not to get splinters when un wrapping.Very good product for my LED lights.TBH the clips and small screws were a waist time . I used it compressed air brad nailer finishing nails. All the lengths went up perfect and fast! The little screws and brackets would of took me all day.The plastic diffusers weren’t easy to put on but once you got one end clipped you slide yoir hand along and easy . The corners i just left flat end to wall then the other piece I trimmed to get overlap look.Works fine. Clips are okay.Tip:try installing this in a “practice room” with your leds. You’ll learn a thing or two the first time that’ll make the next install look way better.easy to instale look nice under counterUnless your led lights are right next to each other, there will be a vey noticeable gap between the lights and there won’t be a solid line like I wanted.Perfect