The BL-MT500 brake lever delivers high-powered mountain biking performance and I-spec II compatibility.Great value easy to use hinged design brake lever gives you plenty of power at your finger tipsShort stroke Servo-Wave mechanism for quick pad engagement and more power for aggressive ridingOpening clamp band design with hinge for easy Installation and removalAlloy brake lever for secure and dependable brakingFor use with mineral oil onlyAn increase in pad clearance at the calliper has enabled Shimano to use their proven Servo Wave technology. As the brake lever is pulled a cam linkage enables rapid pad to rotor engagement, at the point of contact the cam moves across multiplying the leverage ratio and increasing the stopping power. Adjustable free stroke enables you to fine tune the amount of lever pull before pad and rotor engagement.