The cutter measures 4″ with a 7/8" bore. It has 6 teeth. Works with #0, #10 & #20 biscuits. Carbide tipped.
BISCUIT JOINER BLADE
QUESTIONS & ANSWERS
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Dose this fit a 556 or 557 porter cable brisket joniter
Should fit the 556 it takes 4" with a 7/8" bore. The 557 I believe is the 2" blade and this will not fit that.
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will this fit the grizzly model t31999
Based on the Grizzly info, this should fit. If you find that it does not, you are welcome to return it for a refund.