The Slik AF-1100 Pistol Griphead uses a patented design that allows the trigger handle to release tension on the ball when it is squeezed and lock the ball head in any position by simply releasing the trigger handle. Griphead comes with one quick release plate as shown in the photos.
The PRSQR-Large quick release plate is a direct replacement for the DQ-20 OEM plate that comes with the grip head. We recommend the purchase of additoinal plates to maximize the versatility of the tripod system. 
Slik AF1100E Pistol Griphead (model number 618-311) features include:
• Height = 4.9”
• Weight= 1.2 lbs
• Thread Mount size: 1/4"-20
• Black finish
• Built in Quick Release Assembly
Compatible with the SLIK Large Quick Release Plate (model Number 618-740) which are available in the webstore. Please note that this quick release plate is a different size than the ones that fit the Mini, Medium and Large tripods we sell.