MIJING LSB-01 Motherboard Stratified Screw Pen is a high-end precision screwdriver designed specifically for layered motherboard repairs on iPhone and Android devices. With its innovative stratified marking design, technicians can easily keep track of screw positions during disassembly and reassembly, ensuring accuracy and avoiding damage caused by misplaced screws. Built with a durable aluminum alloy body, this pen features an ergonomic anti-slip grip and a 360° rotating cap, allowing for stable handling and improved work efficiency.