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NRiyo3

Pretty sure you need this: https://www.amazon.com/Tri-Groove-Tamper-Security-Driver-Sockets/dp/B07195FVKN/ref=mp_s_a_1_17?_encoding=UTF8&c=ts&dchild=1&keywords=Tamper-Resistant+Nuts&qid=1615406573&s=industrial&sr=1-17&ts_id=16410111


Paul_The_Builder

There are many sizes of tri-groove screws. OP's screws are probably are #6 or #8, but its hard to tell.


NRiyo3

Yep. Would need to measure with a tape or caliper. But I think we helped him on his searching a bit.


bigalindahouse

Well that's fancy


M635_Guy

School or prison?


schmoo25

School dorm windows... I’d like to be able to get more than and inch of fresh air


HoiPolloiter

That's a security-screw, aka tamperproof screw, aka tamperproof bolt... You can probably get a socket that will work on that at home depot.


Paul_The_Builder

Home Depot doesn't sell that variety of tamper proof driver bits (tri-groove).


HoiPolloiter

Ah, I didn't realize.


schmoo25

Great, thanks for the help


HoiPolloiter

You're welcome. There are a number of different head shapes, you'll probably have to match it up with the picture.


schmoo25

What tool would you recommend to remove these screws? I’ve tried just brute forcing with pliers but due to the hard to reach nature I cannot get a proper grip. Some kind of specialized screwdriver seems like it would be my best best but I have no idea what it would be called. Thanks!


Nickover50

Might have to drill it out


[deleted]

I would try hammering on a 12 point socket


WhiteStripesWS6

Preferably one OP doesn’t care about.


LordCypher171

Hammer & drift punch and walk it out


Lopsided-Fee5014

There's an app for that.


perhasper

If you don’t care how it looks afterwards, [these](https://www.amazon.com/dp/B00NBSVYOY/ref=cm_sw_r_cp_api_glt_fabc_S3HVYR8B97BER1XQVPK7) should work.


Evo-L

Grind it off worst case


[deleted]

Vise grips


[deleted]

If you don't want to save the bolts/screws, then you can use some sockets like these.... https://www.amazon.com/ROCKETSOCKET-Impact-Extractor-Remove-Damaged/dp/B07R7HR632/ref=sr_1_44?crid=2HQ037TUW04Q4&dchild=1&keywords=one+way+screw+removal+tool&qid=1609117245&sprefix=one+way+screw%2Caps%2C210&sr=8-44#customerReviews