Manfrotto 819-1 Hydrostatic Arm 7-Inch with 1/4-20-Inch and 3/8-Inch Threaded Pivoting Pins

Buy from Amazon : http://www.amazon.com/gp/product/B001AXJQOC?tag=scratchandsti-20

Manfrotto 819-1 Hydrostatic Arm 7-Inch with 1/4-20-Inch and 3/8-Inch Threaded Pivoting Pins

Unique hydraulic locking mechanism for secure and effortless locking