If you're tired of guessing where your Z-axis zero point is, this Shars magnetic zero setter is about to become your new best friend in the workshop! Part number 303-3104 makes establishing that perfect '0' reference point on your CNC machine centers super fast and accurate - we're talking 0.001 precision here. The built-in indicator gives you clear, positive alignment so you're not doing multiple spindle approaches like with those frustrating electronic edge finders. The magnetic pull is 6.5 pounds, keeping it securely in place while you work. There's even a spring-loaded setting face that protects against damage if you accidentally overrun. This mechanical zero-setting instrument is all about repeatability and accuracy, saving you time and material on every job. Perfect for machining centers where precise depth control matters. Way more reliable than eyeballing it or using makeshift methods. Your finished parts will thank you for the consistency this tool brings to your setup process!