Check the listing for details. Platinum Drywall Flat Box 8" Blade Holder Assembly. Condition: New. Listed at 39.99 USD. Platinum Replacement Drywall Flat Box 8" Blade Holder Assembly This Platinum 8" Brass Blade Holder will fit on Platinum 8" Flat Boxes. Very easy to replace. If you have any troubles, please feel free to give us a call. Al's Taping Tools is the Largest Drywall Tool Store in the World! We are also a fully equipped, family-owned, and operated automatic drywall tool service center with over 35 years in the industry. We sell and service all major brands of automatic drywall taping and finishing tools. All of our service techs are also fully trained in the operation of the tools we sell and service. So if you are new to automatic drywall tools or have any questions, please give us a call or send us a message. We are here to help. Al's Taping Tools & Spray Equipment815 Tower DriveMedina, MN 55340