# 90 Degree Hand Deburrer A 90° hand deburrer is one of the fastest ways to clean up sharp edges and small burrs after CNC machining.\ It is used **by hand**, with light pressure, and is well suited for quick edge cleanup without risking geometry changes. *** ### What it’s used for * removing burrs on drilled holes The goal is not to create a visible chamfer, but to **remove raised material** left by machining. *** ### Why this matters Unremoved burrs can **falsify measurements**: calipers or gauges may rest on raised edge material instead of the actual surface.\ They can also **interfere with assemblies**, preventing parts from sitting flat or mating correctly. A quick, controlled pass with a hand deburrer helps ensure that both measurements and assemblies reflect the intended machined geometry. *** ### Search terms to buy * 90 degree hand countersink deburrer --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://miwicnc.gitbook.io/miwicnc/tooling-and-workshop-setup/finishing-and-deburring-tools/90-degree-hand-deburrer.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.