The new Avdel Avibulb XT is a high strength 6.4 millimetre diameter steel breakstem fastener with excellent bulbing tail formation, which makes it ideal for the use in thin sheet materials. Avibulb XT structural fasteners feature a wide grip range, especially suited for applications with varying sheet thicknesses. Avibulb Fasteners also have the advantage of good hole fill compensating for irregular, oversized or misaligned holes.