This RAM mount stand is designed specifically for the Garmin Striker Plus 4. It clips directly to the back of the unit and has a 1" ball mount that works with RAM mounts. The ball is left slightly less than 1" to allow heat shrink to be applied to the ball, which gives a much better grip when it's tight so it doesn't move. The hole through the center allows an M4 x 35mm screw with a hex nut for added strength.