A set of long tamperproof impact Spline socket bits in a range of sizes from M5 to M18. The generous 78mm depth gives better access to hard-to-reach fixings that cannot be adjusted with a conventional set. Heavy-duty bits manufactured from chrome molybdenum for strength and durability with a black phosphate finish for improved corrosion resistance. Supplied in a fitted blow-mould storage case to keep the bits safe and organised.