Drill and 1/4" Bit
All available at Home Depot or any hardware store
1 x Hose Clamp, whatever size you need (found in the plumbing aisle)
1 x 1/4" diameter, 20 pitch thread machine screw, 1 1/4" long
3 x 1/4", 20 pitch thread hex nuts
The most important thing to note is the screw must be 1/4" with a 20 pitch thread or it won't fit in the tripod mount of your camera.