The CELL BUCKLE is your best hands-free mount for cell phones, GPS or MP3 players. Cell Buckle CB1 fits the following applications Anything round or flat 1 ¼inch to 1 ½inch inches thick. CB1 will fit steering wheels in cars, trucks, vans, semi trucks, boats and busses. If you are not comfortable with this model on the steering wheel, clip it to the visor up above in your vehicle. Also fits on the aircraft tray table when you are traveling with the tray table UP or DOWN it’s your choice, exercise equipment, mobility carts, baby strollers and joggers with 1 ¼inch to 1 ½inch inch handles. The applications are endless. The Cell Buckle opens to 2.9 inches and holds 0.8 inches wide.