Gatco Sharpeners Replacement Carbide Bits. Gatco Sharpeners Replacement Carbide Bits will replace worn carbide bits on GATCO carbide knife sharpeners. Specifications for Gatco Sharpeners Replacement Carbide Bits: Weight: 0.001 lbs. Height: 9.25 in. Width 7 in.: Length 0.25 in.: Package Contents: Gatco Sharpeners Replacement Carbide Bits Gatco Sharpeners 40021: Replacement Carbide Bits