Hey machinists and tool enthusiasts! This needle point set is exactly what you need for those precise measurements with your dial indicators and depth gauges. You get six different sizes in one set - L7, L13, L22, L30, L40, and L50 - covering pretty much any measuring situation you'll encounter. All of them have M2.5 threads, so they fit standard dial indicators, test indicators, and depth gauges perfectly. The needle points have super fine R0.15mm radius (except the L50 which is R0.2mm), making them ideal for getting into tight grooves, small holes, and detailed work where standard tips won't fit. Made from high-speed steel, so they're durable and maintain their precision over time. The effective lengths range from 7mm up to 50mm, giving you plenty of options for different measuring scenarios. Whether you're working in manufacturing, quality control, or just precision hobbies, having the right contact points makes all the difference in getting accurate readings. This set covers all your bases without needing to buy individual tips. Seriously, if you work with measurement tools regularly, this affordable set will save you time and frustration when you need to switch between different measuring tasks!