This double ball carpenter is made of high quality aluminium raw material, ensuring a sturdy and durable construction. - Material and build - High quality aluminium for strength and long service life. - Compatibility and range - From 25 mm (1 inch) ball head to 17 mm (0.67 inch) ball head. - Compatible with RAM 25 mm to 17 mm base arms. - Size and purpose - Length is 2.5 inches end-to-end. - Used as a GPS device extension. - Mounting options - The 1 inch to 0.67 inch double ball mount supports Garmin GPS and bicycle phone holders, and other 1 inch/25 mm/RMB B-size industry standard socket holders. - Positioning and versatility - Dual ball adapter mounting kit allows 360-degree rotation of Garmin GPS, camera mounts, or phone holders. - Suitable for outdoor riding and photography. Use scenarios - Bicycle navigation setup: attach to a RAM 25 mm base arm, use the 25 mm to 17 mm ball heads to extend and position a Garmin GPS or phone holder for easy viewing while riding; 360-degree rotation enables quick angle changes. - Action camera or phone mounting: mount a camera or phone holder on a bicycle or tripod system, adjust angle on the fly for optimal framing during outdoor shoots. - General extension and adaptation: use with 1 inch/25 mm/RMB B-size sockets on compatible mounts to extend reach and achieve the desired orientation for GPS, cameras, or phones in various outdoor or workshop environments.