Irwin 3 In. 90 Degree Angle Clamp - Bliffert Lumber and Hardware
Generic 90 Deg Corner Right Angle Clamp Vice Grip Welding Single Handle | Jumia Nigeria
A vice grip and a drill bit can form a 90 degree screwdriver, allowing you to secure screws in tight spaces that don't allow for a regular screwdriver. : r/lifehacks
KNIPEX 10 in. Angled Long Nose Locking Pliers 41 44 200 - The Home Depot
Kreg Tool 90-Degree Corner Clamps - Pro Tool Reviews