can someone tell me what this groove with a mini blade is for? : r

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what is this indentation on the blade called? : r/knifeclub

What's the meaning of this groove on the blade of your knife? #shorts #shorts

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These specialty slot cutters are designed for use with a hand router on installed flooring to cut a groove for another piece of flooring or a spline joint. WL-003 also features a nail relief groove. Carbide tipped.

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