Extended ejector for removing chain-rings and crank, easy to install and use. Crank Extractor 1 x Crank Extractor. Cordless Impact Wrench 1000NM Power Tools 1/2" GEARZAAR Drill Gun Upgrade UK. This tool is used to remove SQUARE type crank arms, all you need is either a 5/8 or 14mm spanner or just an adjustable spanner.
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