OLSHAN GRUNDMAN FROME & ROSENZWEIG
                                 505 Park Avenue
                            New York, New York 10019
                                 (212) 753-7200



                                                           February 12, 1997

Securities and Exchange Commission
450 Fifth Street, N.W.
Judiciary Plaza

Washington, D.C.  20549

                  Re:      The Lehigh Group Inc.
                           Registration Statement on Form S-4
                           FILE NO. 333-11955

Ladies and Gentlemen:

         Reference is made to the  Registration  Statement on Form S-4 dated the
date  hereof  (the  "Registration  Statement"),  filed with the  Securities  and
Exchange  Commission  by The  Lehigh  Group Inc.  a  Delaware  corporation  (the
"Company").  The  Registration  Statement  relates to the issuance of 10,339,250
shares of Common  Stock,  and  951,211  shares of  Preferred  Stock  (which  are
convertible   into  237,802,750   shares  of  Common  Stock),   of  the  Company
(collectively, the "Shares") that are issuable by the Company upon the Effective
Time of the Merger of a subsidiary of the Company and First Medical Group Inc.

         We advise you that we have  examined  originals or copies  certified or
otherwise identified to our satisfaction of the Certificate of Incorporation and
By-laws  of the  Company,  minutes of  meetings  of the Board of  Directors  and
shareholders  of  the  Company  and  such  other   documents,   instruments  and
certificates  of  officers  and   representatives  of  the  Company  and  public
officials,  and we  have  made  such  examination  of  law,  as we  have  deemed
appropriate as the basis for the opinion hereinafter  expressed.  In making such
examination, we have assumed the genuineness of all signatures, the authenticity
of all documents submitted to us as originals, and the conformity to original

Securities and Exchange Commission
February 12, 1997
Page 2

documents of documents submitted to us as certified or photostatic copies.

         Based upon the  foregoing,  we are of the opinion that at the Effective
Time of the Merger the Shares  will be duly and validly  issued,  fully paid and
non-assessable.

         We are  also of the  opinion  that  the  disclosure  regarding  the tax
consequences  of the Merger made under the caption  "Certain  Federal Income Tax
Consequences"  in  the  prospectus  constituting  a  part  of  the  Registration
Statement, is accurate in all material respects.

         Capitalized  terms  not  otherwise  defined  shall  have  the  meanings
ascribed to them in the Registration Statement.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration  Statement  and to the  reference  to this firm  under the  caption
"Legal  Matters"  in the  prospectus  constituting  a part  of the  Registration
Statement.

         We are  members  of the Bar of the  State of New York  and,  except  as
stated  below,  we express no opinion as to the laws of any  jurisdiction  other
than the State of New York, the corporate law of the State of Delaware,  and the
federal laws of the United States of America.

                                     Very truly yours,


                                  /s/ OLSHAN GRUNDMAN FROME & ROSENZWEIG LLP
                                     --------------------------------------
                                     OLSHAN GRUNDMAN FROME & ROSENZWEIG LLP