Includes: Tripod Adapter Materials: 6061 Aircraft Grade Aluminum Compatibility: Picatinny or M-LOK Weight: 1 oz Finish: Hard Anodized Black Warranty: Lifetime For direct attachment to 3/8 inch 16 tps and 1/4 inch 20 tps threaded tripod heads. Constructed from lightweight 6061 grade aluminum. Available in M-LOK or Picatinny versions The level bubble attaches to your rifle scope via the integrated ring mount.