exhibit 10. 36 712 fifth avenue new york, new york 10019 ( 212 ) 957 - 5002 november 15, 2017 gs direct, l. l. c. c / o goldman sachs & co. 85 broad street new york, ny 10004 attention : bradley j. gross re : purchase agreement dear sir / madam : reference is made to the purchase agreement, dated november 13, 2013, by and between gs direct, l. l. c. ( “ gs direct ” ) and griffon corporation ( “ griffon ” ), as amended by ( i ) that letter agreement dated november 12, 2014, ( ii ) that letter agreement dated november 12, 2015, and ( iii ) that letter agreement dated november 16, 2016. this is to confirm our agreement that section 10 of the purchase agreement ( “ right of first negotiation, investment agreement and registration rights agreement ” ) is hereby amended to extend the period thereunder from december 31, 2017 to december 31, 2018. please execute this letter in the space provided below to confirm your agreement with the foregoing. sincerely, griffon corporation _ / s / seth l. kaplan _ _ _ _ _ seth l. kaplan senior vice president acknowledged and agreed : g. s. direct, l. l. c. _ / s / bradley j. gross _ _ bradley j. gross vice president