We claim the ornamental design for a brake lever, as shown and described.
FIG. 1 is a perspective view of a brake lever.
FIG. 2 is a front view of the brake lever shown in FIG. 1.
FIG. 3 is a rear view of the brake lever shown in FIG. 1.
FIG. 4 is a right side view of the brake lever shown in FIG. 1.
FIG. 5 is a left side view of the brake lever shown in FIG. 1.
FIG. 6 is a top view of the brake lever shown in FIG. 1; and,
FIG. 7 is a bottom view of the brake lever shown in FIG. 1.
The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed designs. The broken lines which define the boundaries of the claimed designs form no part thereof.