Holds 5/8" Atlas mic stand tubes. Will fasten onto most things up to 2" thick. Constructed of 6061-T6 Aluminum with a Black Annodized finish. The Micro Mic is 1-1/4" wide and has two 21/32" holes to hold Atlas stand tubes. The clamp is fastened to various objects with a 3/8" – 16 TPI thumbscrew. The Atlas stand tube is fastened with a 1/4"-20tpi x 1/2" Yellow Zinc plated thumbscrew. (Atlas stand tube is not included)