Finely machined for greater positioning with smooth, certain action. Three built-in spirit levels for horizontal and vertical control. The head has a quick release camera plate with secondary safety catch for added security. Camera attachment: 1/4' plus 3/8' screw. Optional Plates: 030-38, 030ARCH-14, 030ARCH-38, 030HAS, 030L, 030UNIV, 030VHS-38, 130-14, 130-38.