ITEM NAME:Steel Bike Crank Extractor Bottom Bracket Remover Repair Tool A#S Product Description Description: Features: A necessary tool for outdoor biking Practical and easy to use 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. 1.3cm * 1.3cm Included: Package Content: 1 x Crank 1 x Bottom Bracket.Bottom Bracket 1 x Bottom Bracket. Square Hole: Approx. 1.3cm 1.3cm. Size: Approx. 7.7cm x 1.9cm. 5cm x 3.1cm. Material: Steel.