ITEM NAME:Bike Crank Puller Removal Bicycle Repair Extractor Bottom Bracket RemoverSEAU Features: Suitable for bicycle mountain bike crank, used to remove the square and spline type crank High quality steel material can be stable and durable Ultra strong torsion can be useful and effort saving Specifications: Material: Steel Color: Silver Crank: Size: Approx. 7.7cm x 1.9cm Hexagon Socket Sleeve Internal Diameter: Approx. 1.4cm Black Nut Screw Thread Diameter: Approx. 2.1cm Bottom Bracket: Size: Approx. 5cm x 3.1cm Splined Bottom Bracket Round Hole Internal Diameter: Approx. 2.3cm Square Hole: Approx. 1.3*1.3cm Packing List: 1* Bicycle Crank Remover 1* Bottom Bracket.Suitable for bicycle mountain bike crank, used to remove the square and spline type crank. 1 Bicycle Crank Remover. Bottom Bracket 1 Bottom Bracket. Square Hole: Approx. High quality steel material can be stable and durable.