This precision measurement tool set from Starrett combines versatility with accuracy for your detailed measurement needs. The set includes a professional-grade bore gauge that measures from 1-15mm (1/32-5/8 inch) and a 150mm depth gauge, both crafted from durable stainless steel. The bore gauge features dual-scale markings for convenient metric and imperial measurements, making it ideal for measuring internal diameters and tapered holes. The depth gauge comes with clear, easy-to-read graduations and a smooth sliding mechanism for precise depth measurements up to 150mm. The robust construction ensures long-lasting performance in workshop environments. Perfect for machinists, engineers, and quality control professionals who require reliable measurements. The tools feature precise etched markings that maintain their legibility over time, while the stainless steel construction resists wear and corrosion. The ergonomic design allows for comfortable handling during extended use, making these instruments essential additions to any precision measurement toolkit.