Deburring External Chamfering Tool, Chamfer Tool Deburring External Drill High Speed Stainless Steel Burr Removal Bit Quickly Repairs Damaged Metal External Chamfer Deburring Tool (Sliver-2)

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Good

it does not work and if you return it, you will get less than what you paid for it . be aware

Summary: Would not lock into the 1/4" hex drive of my Milwaukee M12 impact driver. Comparing to a Milwaukee bit, the length past the groove is way to short. I used my 5-inch Milwaukee grinder to see how much the groove needed to be cut for the lock to engage.Recommendations: I specifically bought the hex version to have the option to use in my impact driver. NOTE: when deburing anything, you should not be going so fast that the impact function kicks in, so whether the driver or a drill, go slow so as not to burn your cutting tool. While this will not lock into the driver, it still works.Pros: cuts mild steel 1/2" threaded rod; works in a chuck drill.Cons: hex driver does not lock in.Conclusion: 2-stars for the HEX version; buy the drill version instead.

They don’t work at all. You are limited by the length of the bolt you need to have and then after that they don’t shameful anything. In fact the bolt it stronger. Waste of money. Tossed them straight in the bin and went back to my good old bringer to clean up the bolts. Should be banned from selling this sort of junk.