110 Pcs Screws and Wall Plugs Set(55 x Masonry Screws, 55 x Expansion Anchor Bolts), M6 M8 Wall Plugs and Screws, for Brick Concrete Drywall Self Tapping Screws and Wall Plugs. m6 40 specifications: 20 sets of m6 40 expansion screws provide you with a choice between m6 30 and m8 40.
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