Plasplugs specialised, Hollow Door Fixings are ideal for fitting coat hooks, name plates and other fixings to the narrow gauge of hollow doors and panels. These tough, compact fixings have a rivet type action gripping the inside of the panel. Expanding wings grip securely in hollow doors, thin skin partitions, plywood and fibreglass. While multi-thread technology ensures superior holding power, this Plasplugs product is ideal for the home, boat and caravan. Accepts No. 6 Screws. Specifications: Drill size: 6mm.