Are twin slot brackets strong enough to support a shelf layout?

what size screws for twin slot shelving   Dan what percentage do slot machines pay out

Got a twin slot shelving set but the uprights have huge screw holes? What fitting should I use? Needs to be 6cm long

WoodscrewsSpecialist ScrewsDrywall ScrewsSelf Tapping ScrewsPackersTimber ScrewsConcrete ScrewsDecking Screws Size Please Select, 270mm, 320mm, 220mm Log Ideal for wood Shelves; Screw Hole in underside to secure to shelf; Available in 6 Sizes; Sold as SINGLE items; Compatible with Spur System Size Choose an

crazy money slot machine app Purchase screws & fixings such as uno plugs, spring toggles, plasterboard fixings, gripit & rigifix to assist in wall installations  Myers twin-slot shelving offers outstanding value and is ideal for DIY projects at home as well as trade use in commercial and public venues