EXHIBIT 24

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and
appoints each of John L. Howard, Nicholas Eichenseer, and James Colin
McGee, 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 the 26th day of January, 2023 and revokes any previously
adopted power of attorney with respect to the rights and powers herein
granted.

/s/Nancy L. Beradinelli-Krantz
Nancy L. Berardinelli-Krantz