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

IOL Fixation: Tried-and-True Techniques

V Paneling is a quick and easy way to add architectural detail to any room. These two-piece sets are perfectly matched so that you can shape precisely milled paneling strips in any wood species. Rub collar for 3/4 arbor only!.

Amana Tool SC640 2-Pc Carbide Tipped 3-Wing V Paneling 2-5/8 D x 3/4 CH x 45 Deg x 1/2 & 3/4 Bore Shaper Cutter Set for 1/2 inch Material

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Grooving blade and zero clearance insert.

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The CoBolt with reduced cutting edge hardness to allow more pressure on the sides of the cutting edges. With precision cutting edges for soft and hard wire. Cuts materials like bolts, nails, rivets, etc. up to 13/64 dia. Exceptional cutting performance with minimum effort because of new lever action design. Induction hardened cutting edges approx. 62 HRC. The recess in the blade allows easier cutting of thicker wires, e.g. for false ceilings.

Knipex 71 31 200 R Cobolt Bolt Cutters

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Woodpeckers MINI in-DEXABLE combination and double squares pack all the great features of our full-size in-DEXABLES into compact tools that fit

Woodpeckers I-P8B-MI Mini in-DEXABLE Protractor with 8 Inch Blade and Rack-It

my first knife, could anyone tell me what the hole on the blade is for? sorry if that's a stupid question : r/knives