The thumbscrew allows you to replace your plastic bolt and nut assembly with a Hi-Strength Aluminum screw. The Thumbscrew is a direct replacement for all GoPro HERO Cameras.Features: Made out of precision machined 6061 aircraft aluminum Standard Thumbscrew Length - 2.11" (53.63mm) Includes: 1 - Billet Aluminum Thumbscrew, 1 - Stainless Steel Acorn Nut*GoPro not included