Review on Set Of 2 Randconcept 3M VHB Adhesive Dashboard Mounting Disks, 80Mm Diameter For Strong Suction Cup Phone & Garmin GPS Mounting, Compatible With Disks Up To 3.15 Inches Wide by Scott Yenson

I followed the directions using the alcohol pad to clean the spot on my dash then waited a few minutes for that to dry then removed the 3M sticker plastic and held it to the dash for 1.5 minutes and when I took my hand away the whole disk came with it so I ended up having to use double sided gorilla tape to stick it to the dash. After that the suction stuck well to the disk and holds in place well.