The iBOLT 17mm Dual Ball Drill Base Mount is great for mounting your GPS system or any other 17mm accessory at the optimal viewing position. Use your device as a dash-cam in your vehicle or mount your GPS system with the 17mm ball to get directions. | UNIVERSAL: This iBOLT 25mm / 1 inch ball dual AMPS Pattern Drill base mount is made out of heavy-duty composite material and is compatible with all industry-standard 1 inch / 25 mm mounting arms. Ball joints are coated in rubber material. With the dual ball adjustments, this mount allows you to have the flexibility of rotating your device 360 degrees. | FEATURES: a 30mmx38 mm industry-standard 4 hole pattern (=AMPS) that will work with all industry-standard AMPS adapter plates and vehicle-specific mounts. | COMPATIBILITY: Works with all industry-standard 17mm smartphone holders and is compatible with Garmin GPS devices (Garmin Drive 52 Garmin dēzl OTR series: OTR500, OTR700, OTR800, OTR1000 Garmin RV series: RV 1090, RV890 Garmin Overlander Garmin Catalyst Driving Performance Optimizer Garmin zūmo XT). | Features 1-inch / 25mm / B Size Ball joints that are compatible with all industry-standard 1 inch / 25 mm / B size adapters and arms. | INCLUDES- This kit includes an industry-standard 1 inch / 25mm / B Size AMPS Pattern Drill Base, a 3.75 inch long 1 inch / 25mm / B Size dual ball mounting arm, a 25mm to 17mm ball adapter, screws, and VHB adhesive.