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What is the name of this tool?

Purpose: Hit it with a hammer to loosen a seized screw, etc.

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Source:

User1974
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1 Answers1

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It's (to my knowledge) called a screw impact driver, impact screwdriver, hand impact screwdriver, or just impact driver.

Pᴀᴜʟsᴛᴇʀ2
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    Another name I came across: Manual Impact Driver. – User1974 Aug 21 '23 at 15:33
  • @User1974 - Well, we know how you Canadians are about things :P (Haha, assuming that from Princess Auto, lol :o) Nonetheless, thanks for the add! – Pᴀᴜʟsᴛᴇʀ2 Aug 21 '23 at 21:03
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    Interestingly, I was sniffing around for a very small tool like this a few weeks ago: I ended up having to drill out a Pz-headed screw deep in a precision mechanism which had been secured with Blue Loctite and was wondering whether impact would have broken the seal. – Mark Morgan Lloyd Aug 22 '23 at 04:51
  • @MarkMorganLloyd - It may have. Blue Locktite isn't supposed to be super strong and a good shock from something like this will usually break it free. If the availability is there, heat works the best for freeing a stuck Locktite fastener. Red is usually a lot more problematic. – Pᴀᴜʟsᴛᴇʀ2 Aug 22 '23 at 09:48
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    IIUC, red Locktite is supposed to require heat to break the bond. (I've been wrong about other things, though, and could be wrong about this too...) – FreeMan Aug 22 '23 at 12:33
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    @FreeMan - You are right about red. However, to get blue to break free easier, you can use heat on it as well. You're just trying to break the bond, which heat works very well. – Pᴀᴜʟsᴛᴇʀ2 Aug 22 '23 at 12:51
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    Actually, just hitting a rusty screw with a hammer (and nail punch) is sometimes sufficient to loosen the screw. – Jeremy Boden Aug 22 '23 at 15:05
  • I call it a manual impact driver, and it's a very handy tool to have to loosen small fasteners that have seized or someone has messed up by using the wrong size screwdriver. – David Watson Aug 22 '23 at 18:06
  • @Pᴀᴜʟsᴛᴇʀ2 It was a "moving head" lamp, and I had to get in very deep to replace the LED. As a ballpark figure it must have taken me a couple of hours stripping it and 30 putting it back together, this time using a bit of Purple which is just about the weakest. – Mark Morgan Lloyd Aug 23 '23 at 21:02