Hanson 6617 Die 4-0 7mm 1" Hex, for Tap Die Extraction Hexagon metric dies are ideal for automotive repair and machinery where metric threads are specified These dies are designed to ensure that bolts fit tightly and anchor securely High-carbon steel hexagon dies are great for cutting right-hand external threads Hex-head shape is designed for use in die stock and adjustable wrenches 4 mm - 0.7