Features： 1、CNC turning, quenching and hardening heat treatment, durable. 2、Five‑in‑one function, covering most of the common all‑in‑one shaft scale models. 3、High‑strength chromium‑molybdenum steel, high density, high hardness, quenching and hardening heat treatment. 4、CNC high‑precision turning, lead angle grinding and polishing treatment, no damage to the middle shaft or hands. 5、Five in one multi‑function, suitable for FSA‑386/for DUB16T/for BB‑9100/for BBR‑60/for BB44. 6、The tooth form is precise and uniform, and the teeth are synchronized with the bottom bracket and exert force at the same time. Specification： Item type: 5 in 1 Bottom Bracket Sleeve Material: Chrome-molybdenum steel Color: As picture shown One size size: Approx. 5.5x5.5cm/2.2x2.2in The other side size: Approx. 4.5x4.5cm/1.8x1.8in Height: Approx. 3.5cm/1.4in Weight: Approx. 226g  Process: quenching heat treatment Suitable specifications: 1. Hollowtech: 16 teeth nick 44mm OD cup Suitable: suitable for many external thread types 2.For DUB: 12 teeth 46mm outer diameter cup 3.For BBR60: 16 teeth 41mm outer diameter cup 4.For BB9000: 16 teeth nick 39 mm outer diameter cup 5. For FSA386: 16-tooth nick 49mmOD cup Features: chromium-molybdenum steel, high hardness, CNC turning, high accuracy, Guorun does not hurt your hands, 5 in 1 function, durable, quenching and hardening heat treatment. Package List： 1 x 5 in 1 Bottom Bracket Sleeve