EXHIBIT 24

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes
and appoints each of Nancy L. Berardinelli-Krantz, Ronald J. Edwards,
and Dean Brazier, signing singly, the undersigned's true and lawful
attorney-in-fact to:

(1) execute for and on behalf of the undersigned a Form ID
(including amendments thereto), or any other forms prescribed by the
Securities and Exchange Commission, that may be necessary to obtain
codes and passwords enabling the undersigned to make electronic filings
with the Securities and Exchange Commission of the forms referenced
in clause (2) below;

(2) execute for and on behalf of the undersigned Forms 3, 4, 5, and
144 relating to equity securities of W.W. Grainger, Inc. (the Company)
in accordance with Section 16(a) of the Securities Exchange Act of 1934
and the rules thereunder and Rule 144 under the Securities Act of 1933;

(3) do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete any such Form 3, 4, 5, or
144 and timely file the same with the United States Securities and Exchange
Commission and any stock exchange or similar authority; and

(4) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of the attorney-in-fact, may be of benefit
to, in the best interest of, or legally required by, the undersigned, it
being understood that the documents executed by the attorney-in-fact on
behalf of the undersigned pursuant to this Power of Attorney shall be in
such form and shall contain such terms and conditions as the
attorney-in-fact may approve in his or her discretion.

The undersigned hereby grants to each attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever
requisite, necessary or proper to be done in the exercise of any of the
rights and powers herein granted, as fully to all intents and purposes as
the attorney-in-fact might or could do if personally present, with full power
of substitution or revocation, hereby ratifying and confirming all that the
attorney-in-fact, or his or her substitute or substitutes, shall lawfully do
or cause to be done by virtue of this Power of Attorney and the rights and
powers herein granted.

The undersigned acknowledges that the attorneys-in-fact, in serving
in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities
to comply with Section 16 of the Securities Exchange Act of 1934 or
Rule 144 under the Securities Act of 1933.

This Power of Attorney shall remain in full force and effect until
the undersigned is no longer required to file Forms 3, 4, 5, and 144
with respect to the undersigned's holdings of and transactions in equity
securities of the Company, unless earlier revoked by the undersigned in a
signed writing delivered to the attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of August 27, 2024 and revokes any previously adopted
power of attorney with respect to the rights and powers herein granted.



/s/Paige K. Robbins
Paige K. Robbins