Description: 【Quality Material】: Mountain Bike Hollow Integrated BB Bottom Bracket Wrench is made from a combination of aluminum alloy and stainless steel, ensuring its durability. 【Lightweight Design】: This 5 in 1 Multifunctional BB Wrench features a lightweight hollow design, making it easy to handle and carry around. Despite its light weight, it does not compromise on strength or functionality. 【5 in 1 Functionality】: This versatile wrench offers 5 in 1 functionality, covering most common integrated bottom bracket sizes in the market. It's an essential tool for any bike enthusiast or professional repairman. 【Product Dimensions】: The dimensions of the bottom bracket tool are 200MMx57MMx24.5MM with a net weight of 136.7g, making it compact enough to fit in your toolbag or backpack easily. 【Specifications】: For bottom bracket outer diameter 44mm-16T, 41mm-16T, 39mm-16T, 46mm-12T and 49mm-16T.  Size Chart: Bottom Bracket Tool: 20cmx5.7cmx2.45cm/7.87inchx2.24inchx0.96inch Stabilizer tool: 18.5cmx3.9cm/7.28inchx1.54inch Package Includes: 1 Bike Bottom Bracket Tool 1 Stabilizer tool Note: Please allow slightly errors 1-2cm differences due to manual measurement.