1. Made of aviation aluminum and stainless steel, CNC machining, oxidation treatment 2. Front side with scale,back side with built-in 1/4Inch to 3/8Inch adapter copper nut 3. Designed with self-locking lever structure and knob for fine tuning, compatible with 38mm - 39mm quick release plate 4. With AS standard interface, compatible with for / for ARCA- / for KIRK / for / for MARKINS / for / for kangrinpoche / for / for quick release plate of AS standard interface. Color:Black Material:Aluminum Alloy Package Contents: 1 * Quick-Release Buckle Mounting Bracket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.