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4 long screws to mount 'U' bracket to wall and 4 short screws to mount disc bracket to the back of the dartboard

These are called Injury Piles

or any other harsh environment application

ultra pro playmat toploader 5pcs 24x13 5in B (S) Aquatic expressionStore and protect your favorite playmats with the new 24" x 13. 5" Toploader. Keeps dust and dirt out while protecting your one of a kind playmat. Keeps playmats and other collectibles clean, recyclable. Designed to easily slide your playmat into the toploader through the opening on the long side. 5 Toploaders per pack. (Playmats not included) Holds and protects standard playmats sized 24" x 13. 5" Also holds documents and photos sized 24" x 13. 5"