Description: The main body is made of aluminum alloy, with high hardness and light weight, durable and firm. the handle with anti-slip design, beautiful and practical. It is mainly used for milling and inspection of the bottom bracket, and repairs the original thread damage and the thread depth is too shallow. Replaceable taps, deepen chip removal, smooth tapping, the service life is longer. Sharp without burr, deep thread, smooth tapping texture, firm and durable. Deeper chip removal design to prevent chip accumulation, effectively prevent aluminum chips from clogging during tapping, and easy to use. Bike bottom bracket thread tool for mtb road bicycle tapping repair tools. It can help you improve work efficiency. Specification: Starter Edition: Aluminum Alloy Material, The tap is made of titanium plated high speed steel, suitable for tapping the thread of the aluminum alloy shell. Upgraded Version: Aluminum Alloy/Iron/Stainless Steel, The tap is made of cobalt titanium coated high speed steel, suitable for threading aluminum, iron, stainless steel five-way threads. Tap model: BC1.37x24 Please distinguish the left and right of the bottom bracket threading tool, the left is the crank arm direction, and the right is the chainring direction. Size Chart: Size: 220x127×35mm/8.66x5.00×1.38inch Handle: 240x14mm/9.45x0.55inch Package Includes: 1 Set Bike Bottom Bracket Thread Tool(Included: One L/R end tap each/2 x rotating handles/1x wrench/1x guide rod) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!