Easy to Install: Push the insert into the hole of standard 1/4 inch pegboard then hang the hook into the 5/32 inch hole in the middle of the hook lock. They are suitable for metal pegboard, wooden board bracket with 1/4inch - 9/32inch hole diameter and various hooks with 1/8 - 5/32 inch diameterHigh Quality: The pegboard hook locks are made of high quality silicone, elastic, sturdy, reusable and reliable.Universal Size: The rubber grommet (insert outer diameter is 0.27in/0.7cm) is suitable for the 1/4inch - 9/32inch pegboard and suitable for 1/8 - 5/32 inch pegboard hooks. They will tightly grip the hooks.Function: The pegboard hook locks can fit the hook snugly on the pegboard, stop the hooks from falling when you remove the item from the hook. The insert with threaded design is not easy to slip off from the board bracket.30 Pcs Pegboard Hook Locks: You will get 30 pieces pegboard hook stoppers in black color. Sufficient quantity can meet your various need for pegboard hooks.