The Kupo Super Viser Clamp Center Jaw with Indexed Baby Pin is constructed from high-quality aluminum and steel, featuring a 5/8" (16mm) baby pin positioned at a 90-degree angle from clamp. The baby pin can be easily rotated along the shaft and securely locked into 8 different positions with each position set at precise 45-degree increments, and is locked down by a captive heavy duty nut. The Jaw features unique mechanical interlocking rubber pad provides a strong grip yet protects the surface it's clamped around. It can mount securely onto round and square objects or just about any unique shape up to 3.5" (9cm) in diameter. The Super Viser Clamp Center Jaw with Indexed Baby Pin is the ultimate solution for professionals seeking reliability, versatility, and ease of use.