The Sirui E-20 ball heads work very precisely and smoothly. The small heads are ideal for beginners with compact system cameras. The base can rotate 360 °, ideal for panoramic shots. The ball friction can be continuously adjusted. The safety lock system prevents accidental slippage of the Quick Release Plate TY-50E. The tensioner for the release mechanism is compatible with the Arca-Swiss system, and allows the use of various plates. The E-20 has full metal knobs for better usability. The release plate is rubberised and has three slots in which either the 1/4 "screw can be used. This is especially handy for cameras whose tripod mount is not central on the base of the camera. Features: Ball Diameter: 36mm Weight: 0.36kg Height: 100mm Load Capacity: 12kg Arca-Type Quick Release with Safety 360° Pan with Independent Lock Anodized-Aluminiuum Construction Knurled Control Knobs 360 ° Panorama Function Easy and Fast Control of All Knobs Arca-Swiss Compatible Clamp - Portrait Notch Safety Lock - Prevents Slipping of the Plate Plate with 1/4" Stainless Steel Screw - Head Assembly with 3/8" Thread Plate with Rubberised Finish - 3 Long Slots for Individual Placement Quick Release Plate TY-50E(Dimensions: (5 x 3.9 x 1 cm) and Neoprene Carrying Bag are Included