BIKESERVICE Magnetic Ball Point Hex Key Set - 9-Piece BS9103Magnetic Ball Point Hex Key 9 Piece The BIKESERVICE Magnetic Ball Point Hex Key Set (Part Number: BS9103) is an essential tool for every mechanic and DIY enthusiast. This 9 piece set includes a variety of hex sizes, ranging from 1. 5 mm to 10 mm, providing the versatility needed for various applications. The magnetic feature ensures that your fasteners stay securely in place while you work, making it easier to tackle any project with confidence.