The Starrett 565 drive pin punch is well-proportioned, hardened, properly tempered and finely finished, featuring a knurled finger grip. Each punch has its size clearly stamped on the head. It measures 100mm (4 inches) in length and has a diameter of 5.5mm (7/32 inches). Knurled handle designed to enhance grip security Subjected to a controlled heat treatment process to enhance mechanical properties, resulting in increased strength, durability and resistance to wear and deformation The punch diameter is precisely inscribed on the head for enhanced visibility and accuracy in measurement