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Backer-On #9 x 1-1/4 in. Serrated Flat Head Star Drive Cement Board Screws Combo Kit 2 (750-Pack) 99601 - The Home Depot
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Backer-On #9 x 1-1/4 in. Serrated Flat Head Star Drive Cement Board Screws (185-Pack) 23401 - The Home Depot
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Backer-On #9 x 1-5/8-in Star-Drive Cement Board Screws (140-Count) in the Specialty Screws department at Lowes.com
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Backer-On #9 x 1-5/8 in. Serrated Flat Head Star Drive Cement Board Screws (140-Pack) 23411 - The Home Depot
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