Arkon SM6RMCPM Robust Clamp Phone or Midsize Tablet Mount with Security Knob (sku 59222)Clamps to handlebars and posts . 25 2 inches in diameter or tables and counters . 2 1. 75 inches thick Select mount height with two shaft arms included Optional removable security knob deters theft Arkons SM6RMCPM Robust Clamp Phone and Midsize Tablet Mount is a highly versatile locking clamp mount with a unique jaw design that has an extra wide clamping range for both flat (including tables, desks, counters, shelves) and tubular (including