Essential for watchmakers, craft enthusiasts, and luxury timepiece owners requiring professional grade calendar synchronization instrument Premium steel watch calendar pen, efficient tool for precise timepiece maintenance and calibration resistant steel construction ensures longlasting durability for repeated date and month wheel and mechanical movement servicing tasks Efficient tool for delicate watch battery replacement, calendar wheel alignments, and timekeeper restorations for home use or workshops Multifunctional kits combines high precise date correction stick with ergonomic needle design for scratchproof watch date