Flat Boxes

 The Columbia Automatic Flat Boxes reduce the need to push the compound on to the wall. By engaging, the box springs put pressure on the compound chamber requiring only a light push to operate the box. Well-built and fine-tuned to offer great flat joints...

 The Columbia Automatic Flat Boxes reduce the need to push the compound on to the wall. By engaging, the box springs put pressure on the compound chamber requiring only a light push to operate the box. Well-built and fine-tuned to offer great flat joints...

 The Columbia Automatic Flat Boxes reduce the need to push the compound onto the wall. By engaging, the box springs put pressure on the compound chamber requiring only a light push to operate the box. Well-built and fine-tuned to offer great flat joints...

 The Columbia Automatic Flat Boxes reduce the need to push the compound on to the wall. By engaging, the box springs put pressure on the compound chamber requiring only a light push to operate the box. Well-built and fine-tuned to offer great flat joints...

 The Columbia Automatic Flat Boxes reduce the need to push the compound on to the wall. By engaging, the box springs put pressure on the compound chamber requiring only a light push to operate the box. Well-built and fine-tuned to offer great flat joints...

 The Columbia Automatic Flat Boxes reduce the need to push the compound on to the wall. By engaging, the box springs put pressure on the compound chamber requiring only a light push to operate the box. Well-built and fine-tuned to offer great flat joints...

The Platinum Flat Finishing Box automatically dispenses the proper amount of joint compound and feathers the edges of butt joints and flat joints in one pass. The Platinum Finishing Box helps produce professional results every time. The adjustable crown...

Columbia 8" Fat Boy Drywall Flat Finishing Box holds 30% more mud than the standard Columbia 8" Flat Box. It works great for running the first coat on flat joints and butt seams.  With 30% more mud, you can go longer distances without having to fill it...

Need a larger, stronger box with greater mud capacity for loading flats and butts?  We are proud to meet your needs with the Columbia 14" Flat Box.  This is the largest flat box available on the market today.  This box works great for floating butt...

Columbia 5.5" Drywall Flat Box is the perfect box for getting into those tight areas.  It will fit on all major brands of flat box handles.  Well-built and fine-tuned to offer great flat joints for years. We have been being told for years that our boxes...

The Platinum 8" Flat Finishing Box is designed to automatically apply and feather joint compound, delivering professional-grade results with minimal effort. Whether you're working on butt joints or flat joints, this box ensures a consistent, smooth...

Columbia 10" Fat Boy Drywall Flat Finishing Box holds 30% more mud than the standard Columbia 10" Flat Box. It works great for running the first coat on flat joints and butt seams.  With 30% more mud, you can go longer distances without having to fill it...