ITEM NAME:4 Way Macro Shooting Focus Rail Metal Slider For Pentax DSLR Cameras Description: 4-ways macro focusing rail slider can be adjusted in four directions: forward, backward, left and right. Self-contained precision double scale greatly enhances accuracy and speed of adjustment of the rail. Designed with positive locking knobs assure rock-steady focus. Standard 1/4 screw, which is suitable for all professional SLR cameras. Humanized designed gimbal plate is made of rubber material, wave crest structure, which can increase the friction with the surface of the camera, prevent sliding, and reduce wear and tear on the camera. Specification: Material: Plastic+Metal Size(L×W×H): Approx. 18.5 × 16.2 × 8.5cm/7.2 × 6.3 × 3.3" Package Includes: 1 Piece 4 Way Macro Focusing Rail Slider Note: Please allow a slightly errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understanding and attention.Wish you a pleasant shopping experience! SKU: CKX0009671577004578.4-ways macro focusing rail slider can be adjusted in four directions: forward, backward, left and right. 1 Piece 4 Way Macro Focusing Rail Slider. Designed with positive locking knobs assure rock-steady focus.