Wiha Power Blade Nut Drivers have a solid shaft to provide strength and durability for long-lasting repetitive use. Designed for use with the Wiha Centro Fix handle.Wiha power blade nut drivers have a standard 1/4-inch hex drive and a 3.9-inch overall length, making it easy to work in limited access environments. The drivers are 30mm deep drilled.Consisting of premium quality tool steel, the nut setters are precision-formed for exact-fit and have a durable finish for corrosion protection.The socket openings feature a beveled rim for easy fastener engagement with a broached and smooth finish for prolonged life.