NAIL IN PLUGS

Nail-in wall anchors are fasteners that you insert into a pre-drilled hole and secure by hammering a nail or pin into them, causing the anchor to expand and grip the surrounding material. 

Types and Applications
Nail-in anchors are designed for different wall materials and load requirements, primarily for light-duty applications. 
For Solid Walls (Concrete, Brick, Stone):
Description: These anchors typically have a nylon or alloy body and a metal nail or pin. Hammering the nail in expands the anchor body within the pre-drilled hole in the masonry, creating a secure, permanent hold.
Best For: Light to medium-duty fixings such as electrical sockets, cable clips, small shelves, mirrors, and light-duty curtains.