Used for attaching metal to heavy section steel (Max. 12mm) without the need to pre-drill a hole. Self Drilling.Heavy Section Screws Exterior Silver with EPDM Washer - 5.5 x 55SKU: H55W16B£12.71PriceExcluding VATSub Categories*Roofing & Construction ScrewsType*Self-Drilling Screw - Heavy Duty Section SteelPack Type*BoxSize*5.5 x 55Quantity*(100)pcsQuantity*ADD TO CART