General description 100% Brand New Golf Ferrule Installation Tool for Golf Club Irons. This tool is designed to assist in the proper placement of ferrules on golf club shafts, making it a valuable helper for workshop assembly. Technical specifications Inner Diameter: 9.45mm / 0.372 inch Outer Diameter: 13mm / 0.512 inch Color: Silver Material: Metal Package Contents: 2 x Golf Ferrule Installation Tool Measurement allowed error: +/- 1-3 cm