Bicycle Bottom Bracket Removal Socket Cycling Crank Pedal Puller Remover Repair Extractor Bike Universal Removing Tools Parts Features: Bottom Bracket Remover : With 20 teeth, used to disassemble bike bottom bracket.Teeth & slot shape improved, easier to engage and use, minimizing the damages to B.B.; With due heat treatment in production, tempered, hardness maintained; Applicable with both flat & square spanners for wide range of use; Crank Pedal Puller Remover: Universal bike crank puller, extended ejector for removing chain-rings and crank.Tool needs either a 5/8 or 16mm spanner or just an adjustable spanner.Screw in and continue to tighten the silver piece of the tool until the crank starts to move.Screw the lower black part of the tool into the crank till tight. Specification: Weight: Bottom Bracket : Approx.115g Crank : Approx.122.5g