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Columbia's 5.5” specialty drywall flat box is specifically designed to apply joint compound to no-coat 325, and 450 inside off angles, and straight-flex inside off angles. It can also be used to apply a final coat on drywall nails and screws.
Features:
- Hinged door allows the flat box to open wide for easy clean up
- Fits most style flat box handles
- Bead wheels
- Hand made from U.S. billet aluminum and steel components
