The 91AV is a 1-1/8" punch component designed for manual knockout operations in industrial applications. It is engineered to punch holes in mild steel up to 14 gauge (2.0 mm) thickness and features a ball bearing drive screw for smooth manual operation or compatibility with ratchet and hydraulic drivers. The punch has an actual hole diameter of 1.125 inches (28.6 mm) and is part of Greenlee's standard round manual industrial punch kit that includes multiple punch sizes for versatile hole-making tasks. This tool is ideal for maintenance, repair, and operational applications where quick and reliable hole creation is required in sheet metal and conduit work.