The ornamental design for a single bladeratchetscrewdriver, as shown and described.
FIG. 1 is a front perspective view of a single blade ratchet screwdriver according to the present invention illustrating the top, front, and right sides of the single blade ratchet screwdriver. The left side of the single blade ratchet screwdriver is a mirror image of the right side as illustrated.
FIG. 2 is a front elevation view of the single blade ratchet screwdriver of FIG. 1.
FIG. 3 is a rear elevation view of the single blade ratchet screwdriver of FIG. 1.
FIG. 4 is a bottom plan view of the single blade ratchet screwdriver of FIG. 1; and,
FIG. 5 is a top plan view of the single blade ratchet screwdriver of FIG. 1.
The broken lines in the drawings indicate portions of the single blade ratchet screwdriver that form no part of the claim.