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'29 Pickup · 01-16-2025, 04:48 AM

Think I found them.
Traced them back from locally available, re-branded but very expensive, to the manufacturer in Taiwan, Cosda Manufacturing. https://www.cosda.com.tw/1-2-dr-twis...-sd-1030p.html

Manufacturing process: https://www.youtube.com/watch?v=7H-ETs3oq6c&t=7s
They appear to be machined rather than cast.

19 sockets, so even though they state metric, if the head/nut is rounded, it's moot which size will fit so a large range of sizes seems sensible. Most sets are usually only 8 or 10. Use of a hammer would seem to be the answer. And this is where it gets tricky for the cheap/less strong ones, for breakage.
These are made from SNCM 439 with a hardness of HRC 50-53 which I have no idea what that means but it sounds impressive.
Minimum order direct from Cosda on Alibaba with Fedex shipping, is 1 set:
https://www.alibaba.com/product-deta...006464020.html

01-16-2025, 04:48 AM	#2
'29 Pickup Member Join Date: Jan 2025 Posts: 44	Re: Which Rounded Nut/Bolt Remover Think I found them. Traced them back from locally available, re-branded but very expensive, to the manufacturer in Taiwan, Cosda Manufacturing. https://www.cosda.com.tw/1-2-dr-twis...-sd-1030p.html Manufacturing process: https://www.youtube.com/watch?v=7H-ETs3oq6c&t=7s They appear to be machined rather than cast. 19 sockets, so even though they state metric, if the head/nut is rounded, it's moot which size will fit so a large range of sizes seems sensible. Most sets are usually only 8 or 10. Use of a hammer would seem to be the answer. And this is where it gets tricky for the cheap/less strong ones, for breakage. These are made from SNCM 439 with a hardness of HRC 50-53 which I have no idea what that means but it sounds impressive. Minimum order direct from Cosda on Alibaba with Fedex shipping, is 1 set: https://www.alibaba.com/product-deta...006464020.html Last edited by '29 Pickup; 01-16-2025 at 06:43 AM.