RAM Twist-Lock Low Profile Suction Mount for TomTom GO 510, 710 & 910 (RAP-B-166-2-TO3) (sku 54253)The RAP B 166 2 TO3 consists of a 2. 75" twist lock suction cup base, double socket arm and high strength composite cradle. The suction cup, twist lock base is designed to have a strong hold on glass and non porous plastic surfaces, including RAM adhesive disks. Designed into the mount is a 1" diameter patented rubber ball and socket system with adjustment points at both ends of the socket arm; this with a twist of the arm knob, allows you to move the