These are a must have! Use a 1/4" drill bit (Wood / Masonry) and "hang" the liner as you stick it to the double-sided wall tape. This prevents it from being pulled off the tape as you work your way down the wall. Our crawlspace was real nasty, so nasty and tight I couldn't get a contractor to take the job. Glad they didn't... I did it myself for cheaper and probably did a better job.

Great product, don't know if there is anything that comes close. I looked, and found nothing that will work as well. simple, affordable, effective, what more can you ask for?

Work as advertised and make putting up 20mil liner on the walls much more secure and professional. Use a professional type hammer drill (I used this project as an excuse to purchased a mid-level Bosch rotary hammer)and you will be done in no time. After inserting the pins by hand/thumb, I used my soft rubber mallet to give them a nice little tap. Be a pro and don't leave this step out.

Easy to install. Great product.

Worked perfectly.