plastic Easy to Use No need any complicated steps. Its easy to remove from the mount, making it perfect to take with you once you've reached your ride destination. 360 Degree Rotation The bicycle lamp holder can be installed at 360 degree without any dead angle. So you can rotate it to meet your multiple requirement. Great for both Professional and non- Professional riding. Sturdy quality With its high quality ABS and anti-slip rubber material, make this flashlight mount more sturdier than normal mount but also no harm to your flashlight, withstand for a long term use. 3 Gear Adjustable - Can adjust to different gear to hold different size pipe diameter. Compatible diameter: 1.8cm-3.8cm. Buy with Confidence - You will get 2 x flashlight clamps, high quality make it a perfect Charstmas gift for bike, bicycle , cycling enthusiast. Made in the USA or Imported