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Lyman™ Outside Chamfer and Deburring Tool

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Quick Overview

Lyman™ Outside Chamfer and Deburring Tool is perfect for removing excess brass from trimmed cases. It easily deburrs the outside case mouth leaving a smooth even finish. 

Availability: Backorderable



Lyman™ Outside Chamfer and Deburring Tool

The Lyman Outside Chamfer and Deburring Tool is perfect for removing excess brass from trimmed cases. It easily deburrs the outside case mouth leaving a smooth even finish. 

Technical Information

Fits: Cartridges from 17 to 45 caliber 
Function: Deburrs the outside case mouth 
Material: Steel cutter, plastic ergonomic handle 

  1. Simple but effective review by Sven on 6/21/2017

    i\'ve tried a couple diffrent tools for this function, this one is easiest to use and gives great results. Assuming you can operate a screwdriver....

  2. Good tool review by Catmandoo on 6/21/2017

    The tool works well. After about 4000 .223 cases it became a little dull, but, it worked well up to that point. I am ordering another identical one to replace it.

  3. The bestest one. review by Dave on 6/21/2017

    I have a couple of these from different manufacturer\'s. This is one is my favorite. Sharp...and easy to use.

  4. Upgraded review by JW on 6/21/2017

    I unscrewed the tool from the handle and screwed it into my 4 year old RCBS case prep mate. Quite a bit more aggressive than what I was using. Less effort to do more.

  5. Very nice! review by Showdon on 6/21/2017

    Very nice reduction. Ergonomics are good, making it easy to use. A few quick twists and this chore is done on the case. The handle makes this a really good tool. Works well for the 100 or so cases I have used it on to date,

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Most items ship within 1 business day. We ship orders from our warehouse Monday through Friday. If an in-stock order is placed on Friday evening, Saturday or Sunday, it may not ship out until the following Monday. We rush-ship directly to customer's doors throughout the United States. Depending on the shipping method and area of the country, orders can arrive between 1 and 7 business days. 


Standard Ground FREE over $50 4-7 Business Days
Three-Day Variable Cost 3 Business Days
Two-Day Variable Cost 2 Business Days
Overnight Variable Cost 1 Business Day

First Class $3.00 to $5.00 1-5 Business Days
Priority Mail Variable Cost 2-3 Business Days


If you are not 100% satisfied with your order, you can return it to us for a refund or exchange within 30 days of delivery. We accept returns on all products that have not been used or registered, no questions asked. All returns are subject to a 5% Re-Stocking Fee. To make returning an item easy, contact our friendly customer service representatives toll free 1-855-297-7000.

warning-iconWARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to -