Leofoto Multipurpose Clamp Black. The screws are made of stainless steel and the clamp securely mounts onto any rod or pipe up to 2.2''. There are two 3/8''-16 threaded holes that can be used to mount additional attachments such as the AM-series magic arms smartphone clamps LED lights and microphones after installing the bushing reducer to convert the 3/8''-16 hole to a 1/4''-20 screw. Specifications for Leofoto MC-60 Multipurpose Clamp: Manufacturer: Leofoto Color: Black Quantity: 1 Features of Leofoto MC-60 Multipurpose Clamp Aluminum CNC Machining Package Contents: Leofoto MC-60 Multipurpose Clamp Leofoto MC-60: MC-60 Multipurpose Clamp Black