If you want to hold two items (wood or metal or any other) together while you are working on them, Clamps are the tools for this job. They are relatively inexpensive and frees your hands by holding the objects as you work to attach, paint, glue or assemble the product.
A C-Clamp is an extremely popular type of clamp. Some other clamps are Toolmaker’s Clamps (Hand Screw Clamps) Sash Clamps, Spring Clamp, Pipe Clamp, Bench Clamp, Drill Press Clamp and a Bench Vice.