Features: 1. Suitable For 1/4 Thread Action Camera, Moment, Mobile Phone Clip 2. 1/4 Lock Anti-Loosening Reinforcement, Locked By Rotating Disk, After Locking, You Can Use A Wrench For Secondary Reinforcement 3. Suitable For Large Pipe Diameter Range, Suitable For Pipe Diameter Range 22~25.5mm And 30~32mm 4. Cnc Aluminum Alloy High-Grade And , Aluminum Alloy CNC Precision Machining, Strong And 5. Sandblasting Process 1. Product Name: 1/4 Screw Bicycle Clamp 2. Product Size: 50 x 50 x 19mm 3. Main Material: Aluminum Alloy 4. Process: Sandblasting 5.Color: Black & Red 6.Style: B-Clamp Mountain+Wrench Package Contents: 1 x 1/4 Anti-Loose Bicycle Holder 1 x Hex Wrench 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.