Features: Professional Bottom Bracket Tool delivers precise installation, preventing wear and deformation with aerospace grade aluminum alloy construction. Features multiple adapters, ergonomic handles, and a manual removal system enabling BB extraction without external equipment for compatibility across bike models. Ideal for professional mechanic and cycling enthusiasts seek workshop grade precisions in garages or mobile repair. Perfect for trailside BB maintenance, workshop upgrades, or routine bike overhauls during tours and daily commutes. Engineered with 50kg load bearing stainless steel cores and grooves, this bike tool kit ensures decade long reliability while reducing long maintenance costs. Specifications: Material: Aluminum alloy, stainless steel Size: about. 3.4x2.8cm/1.34x1.1in Applicable model: for BB86/BB30/BB91/BB92/PF30 Package Includes: 1 Set Install Removal Tool note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.