Hot Sale 1pc Repair Tools 1pc Cycling Bicycle Mountain Bike Crank Wheel Puller Pedal Remover This Tool is very easy to operate and ideal for Square Tapered Crank home repairs. Simply remove the bolt in the crank arm using a spanner Screw the lower black part of the tool into the crank until tight Made of high quality metal, is very durable Screw in and continue to tighten the silver piece of the tool until the crank starts to move Easy use & suitable for beginners 14/15mm spanner or adjustable spanner