Special Design for Threads and Square Tapered Crank Arm Crankset - -Material: durable harden alloy steel - -Suitable for standard square taper crank. - -Handy for any bike owner to keep in the toolbox. - -Simple to use, also good for home mechanic Package Including: 1 X Bicycle Crank Extractor 1 X 16mm Spanner 100% Satisfaction Guarantee, Any product issues, we are very happy to either provide a Refund or a Replacement! The crank extractor is used to remove square type crank arms, not fit octalink crankset High compact extractor puller and smooth revolving bolt ensures smooth operation and long life A necessary parts for bicycle repair, bicycle crank arm puller set, came with 16mm hex spanner Easy to operate and use, handy for any bike owner to keep in the toolbox, also good for home mechanic Search "bike tool" on product catalog if you need more professional bicycle maintenance tools