Banjo shelf supports are a loop of metal formed into the shape of a banjo. They are a little bigger than most shelf studs supports, which means they are good for spreading the load under the shelf. 6.5mm holes are required in the vertical sides of a cabinet for the sockets to be inserted into. Packed version includes: buffer pads, 30 x 19 x 6mm Stud, 10 x 9mm Socket. Can be housed into the underside of the shelf if required with a forstner drill bit.