Proper service. Nice staff. Good advice on products.
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BT510 Crank extractor 14mm
Used to remove crank arms.
Tool needs either a 5/8 or 16mm spanner or just an adjustable spanner.
This tool is incredibly simple to use.
1 Remove the bolt in the crank arm
2 Screw the lower black part of the tool into the crank till tight (ish)
3 Screw in and continue to tighten the silver piece of the tool until the crank starts to move.