The magnesium velbon phd 64q is a pan and tilt head which features three dimensions of adjustment 360 degree panning back to front tilt and tilt to either side the phd 64q is able to hold 10 000g in weight which makes it ideal for supporting large dslr cameras with heavy zoom lenses attached the head comes with three spirit levels and a qb 635l quick release plate with 20 screw attachment