Plastic hooks that use 3M's Command Adhesive which holds securely but removes easily with Stretch Release Technology.
The Mizzou Store - Command 3M Clear Adhesive Hooks
3M Command Utility Large White Hook (Holds)2.2kg
MMM 17004 3M Jumbo Hook w/ Command Adhesive MMM17004
3M Command Self-Adhesive Hook - White - Extra Large - 7100270047
3M Command Hooks & Strips, Small - 6 ct
3M 172 x 99 x 8 mm Silver Adhesive Hook x 1
MR03BC 3M, 3M 172 x 99 x 55 mm Adhesive Hook x 1, 914-3519
Command 15 Lb XL Heavyweight Wall Hook, Damage Free Hanging Wall Hook with Adhesive Strips, Heavy
3M COMMAND LIGHT ADHESIVE HOOKS
Command Large Utility Hooks, White, Damage Free Decorating, 6 Hooks and 12 Command Strips 17003-6ES - The Home Depot