For COLNAGO disassembly tool Material: AL7075-T6 Application: For COLNAGO diameter 53mm, 16-hole bottom bracket Weight: 88g 16 Notch Ø53.0mm for T45 (Colnago Threadfit 82.5)SRAM Campagnolo UT/30mm/SRAM DUB Magnetic centre guide for 29 and 30mm bearing bore. Stable engagement with cups for easy installation and extraction. Precision machined for scratch-free use. We use 7075-T6 aviation aluminum, which is milled by CNC, and proofing for many times to minimize the gap with the central shaft or locking ring and ensure the strength of the tool. The guide design is made in the tool, and the central shaft or shaft sleeve is fixed inside and outside at the same time during use, so as to prevent damage to the central shaft caused by excessive force or incorrect methods. All the claws of our tool are a whole. With good fit, the tool is durable