The ornamental design for non-slip attachment for the strap of a shoulderbag, as shown and described.
FIG. 1 is a perspective view of the non-slip attachment for the strap of a shoulder bag of my new design, showing it in an open position.
FIG. 2 is a perspective view of the non-slip attachment for the strap of a shoulder bag of my new design with keys attached showing it in a closed position, enclosing a portion of the shoulder strap of a shoulder bag.
FIG. 3 is a bottom plan view thereof.
FIG. 4 is a top plan view thereof.
FIG. 5 is an elevational view of the front thereof.
FIG. 6 is an elevational view of the back thereof.
FIG. 7 is an elevational view of the right side thereof; and,
FIG. 8 is an elevational view of the left side thereof.
Various items such as key chains can be affixed to the attachment, thus enabling easy access to keys when needed, and avoiding one having to search for keys in the contents of a shoulder bag or purse.
The broken lines showing keys and a portion of the shoulder strap of a shoulder hand bag in FIG. 2 depict environmental subject matter that forms no part of the claimed design.