Double sided tape included and 4 screws iBOLT offers industry standard AMPS pattern connection adapters and mounts. The AMPS Pattern consists of four (4) holes located in a rectangular pattern What Garmin GPS systems use a 17mm ball mount? Here are some of the most popular Garmin GPS Devices that are compatible with a 17mm ball mount: Garmin Drive 52 iBOLT Aluminum 3.75 inch Double Socket Arm for All Industry Standard 1-inch / 25mm / B Size Ball adapters Ibolt Amps Adapter Plate Size IBOLT™ 20mm Metal AMPS Adapter Plate Ibolt Amps Adapter Plate For Sony Perfect for KUDA, Arkon, Garmin or any Pedestal type Mount 2-Way Single T-Slot Pattern to 4-Hole AMPS Adapter Plate - Mounts 17 mm ball joint - fits all iBOLT car-docks Garmin dēzl OTR series: OTR500, OTR700, OTR800, OTR1000, Garmin Overlander