These ribbed expansion anchors are widely used for quick and secure fixing in concrete, aerated concrete, plaster tiles, gypsum fibers, solid and hollow bricks. The ribbed interior is suitable for wood screws and chipboard screws and allows secure guidance of the screw. Resistant and reliable, they make your work easier by ensuring practical, stable and solid assembly Set of 10 dowels. Dimensions: Total length: 38 mm. Int. diameter: M8. Unit weight: 6 g. Material: steel Advantage: The external serration expands into the support material and guarantees high resistance. By inserting the screw, the dowel expands and the outer metal serrations securely attach into the backing material. The body provides good hold and guarantees solid anchoring, approved over time The expansion anchor is suitable for standby assembly. The drilling diameter must be adapted to the strength and compression of the construction material. Note: in aerated concrete of low strength class you do not need to drill a hole first. The dowels with dimensions 6x32 and M8x38 can be driven in directly without pre-drilling Application: concrete, brick with vertical perforations, hollow lightweight concrete block, hollow and solid sand-lime brick, natural stone with dense structure , cellular concrete, solid light concrete block, plaster tile. It is your perfect choice to carry out your renovation, installation, furnishing, layout, decoration projects