Rawlplug
/ˈrɔːlplʌɡ
/noun British trademark
A thin plastic or fibre sheath that is inserted into a hole in masonry in order to hold a screw.The correct method is to drill a series of holes, insert Rawlplugs and screw in the vine ties tightly.
Origin
Early 20th century: from Rawlings (the name of the engineers who introduced it) + plug.