Used for attaching metal to heavy section steel (Max. 12mm) without the need to pre-drill a hole.Self-Drilling Heavy Section A2 Stainless Steel Bi-Metal Screws - 5.5 x 55SKU: BMH55£45.85PriceExcluding VATSub Categories*Roofing & Construction ScrewsType*Self-Drilling Screw - Heavy Duty Section SteelPack Type*BoxSize*5.5 x 55Quantity*(100)pcsQuantity*ADD TO CART