The clamp range of 0.625″-1.5″ diameter on round surfaces and 0″-1.14″ on flat surfaces allows users to find the ideal mounting position for the RAM® Tough-Claw® with RAM® Flex-Rod™ 26″ Extension Arm. KEY FEATURES Overall Height: 26” Uses RAM B size ball and socket system Holds up to 2lbs maximum capacity Made from marine grade aluminum and high strength composite Product weighs 1.33 lbs This kit includes a small RAM® Tough-Claw™ clamp base connected to an 18” RAM® Flex-Rod™ and medium double socket arm. The RAM® Tough-Claw™ can be clamped to 0.625″ – 1.5″ diameter rails. Designed for use with popular wheelchair brands, clamp the RAM® Tough-Claw™ in place and pair with your preferred B size device holder.