Plasplugs Originals™ Heavy-Duty Fixings are designed for making larger or heavier fixings into brick or blockwork and masonry. Suitable for concrete, brick, breeze block and stone. The plugs feature multi-action grips, expanding barrels, barbed jaws and anti-rotate ribs. Typical applications: shelving, curtain poles, lighting, hooks and brackets, pictures and mirrors. Colour: Brown.Screw Type: No.8-14 (4.5-7mm).Drill Bit: 7mm.