Fireplace Key Hearthmaster .30" (8mm)
thingiverse
Square size is .30" (8mm), Hearthmaster model, printed at 50 infill normal PLA and added WD-40 before use, worked out perfectly. I recommend print 2 or more and have other tools at hand in case of failure. I used this one for the texas ice emergency feb 2021 because I could not find one at stores (sold out). Be safe
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