This is a u-bolt handlebar mount with X-Grip cradle for larger phones and phablets like the iPhone 12 Pro Max.

It consists of a zinc coated u-bolt base, a double socket arm and universal spring loaded X-Grip® IV cradle for large phones and phablets. The u-bolt will fit any bars between 0.50" to 1.25" (12.7mm to 31.75mm) in diameter. The base also includes black cover caps that are placed over the exposed ends of the u-bolt. 

The X-Grip holds the phone very tight, but also does include a RAM-HOL-UN10TU :: RAM Tether for UN10 X-Grip Holders. Will work with all phones that fit the dimensions listed below.

• U-Bolt Dimensions: 0.50" to 1.25" (12.7mm to 31.75mm)
• Cradle Dimensions:
  Minimum Width = 1.75" (44.45mm) - at this width the minimum height must be 5.5" (139.7mm)
  Maximum Width = 4.5" (114.3mm) - at this width the minimum height must be 3.25" (82.55mm)
  Depth = 0.875" (22.22mm)
• Rustproof
• High strength composite and stainless steel construction 
• Spring loaded cradle expands and contracts for perfect fit of your device 
• Rubber coated tips will hold device firm and stable 
• Socket technology allows for multiple adjustment angles and articulation of device 
• Includes Tether for open cockpit and extreme environments 
• Lifetime warranty
• Made in U.S.A.
• Material: Powder Coated Marine Grade Aluminium, Marine Grade Stainless Steel Components & High Strength Composite
• Ball Size: 1" Rubber Ball "B" Size

Note: The "U" in the part number reflects product packaged in poly bag. RAM highly recommends using the provided Tether for all open cockpit applications while using this product.