? What's in the Box? TUSITA Small Rail Base with 1"Ball x1;TUSITA Double Socket Arm 1" - B Size Short x1;TUSITA Spine Clip Holder with B Size 1" Ball x1. ?Optimal Viewing?The Double Socket Arms have a full range of motion with a 360-degree rotation capability in the horizontal direction and a 180-degree rotation capability in the vertical direction. Additionally, the ball heads located at each end provide both 180-degree and 360-degree movement options, enhancing the flexibility of angle adjustments. ?Durability And Reliability? Marine Grade Stainless Steel Components & High Strength Composite. Nylon construction with corrosion resistant stainless steel hardware. Rubber pads provide stable and even gripping and protection of mounting surface. ?Features? Small version designed to quickly install to round rails FITS HANDLEBAR SIZES:22.2mm (?”), 25.4mm (1”), 28.6mm (1-?”), 32mm (1-¼”) (diameter); rubber pads provide stable gripping and protection of mounting surface. ?Compatibility? Compatible with any Garmin handheld GPS that uses the spine mount system.