Neewer Q-Type Multifunctional Aluminum Clip with 1/4"&3/8" Screws for Battery Pack,Flash Speedlites,Photo Studio Lights and Other DSLR Camera Accessories Designed to hang battery pack,install different flashes Attaches camera, binocular, scope, etc to railings, roll bars, handlebars, etc. Several 1/ 4 and 3 / 8 bracket mounting holes to adjust light ankles flexibly. Utilizes a unique ball and socket head for quick and easy adjustment Ajustable range from 3mm to 45mm