Single socket arm compatible with RAM mounts and FANAUE any 1 inch ball adapter, can accommodate all industry standard B size/1“/25.4mm ball head, which can be well extended to connect with magnetic car mount, buggy phone holder ect, phone mount base for a variety of scenarios to work, such as scooters, strollers, shopping carts, dirt bikes and other models, providing you with a variety of mounting solutions to enjoy more convenient riding trip. Single socket arm connected with 1 inch ball adapter can be rotated 360°, easy to adjust the device to horizontal or vertical direction, connect the phone clip to assemble different phone holder, Phone holder base is assembled by single sock Phone holder base is assembled by single socket arm and flex holder adhesive base, no need to connect the rod can be directly connected with phone holder with 1 inch ball head, single socket arm flexible holder sticky base ergonomic design, perfect fit for ball head adapter, connect tightly and not easy to loosen, labor-saving butterfly knob design can adjust the tightness of single socket arm, tool-free installation, anyone can operate.