The ornamental design for a ratchetbitdriver, as shown and described.
FIG. 1 is a perspective view of a ratchet driver bit according to my new design;
FIG. 2 is a left side elevation view thereof;
FIG. 3 is a right side elevation view thereof;
FIG. 4 is a top elevation view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a front elevation view thereof; and,
FIG. 7 is a rear elevation view thereof.
The dash-dash broken lines showing in the views illustrate unclaimed portions of the ratchet driver bit and form no part of the claimed design. The dash-dot-dash lines showing in the views illustrate boundaries of the claimed portions of the ratchet driver bit and form no part of the claimed design.