BOX YOUR CORNER BEAD WITH BEAD BOXERS. The Bead Boxer Flat Box Cornerbead Kit adapts to your flat box and allows you to finish corner metal, paper-faced bead, and bullnose corner bead with speed! *Will not work with Blue Line USA/Premier BeadBoxers...

The RP200 Recess Plate is designed to be fitted to a Blue Line 8 in. Flat box, to reduce the finished width to 5.5 in. This is great for filling the recess after taping and provides a clean machine finish, feathered at the shoulder of the recess. The...

High capacity flat boxes from Blue Line USA. Peened construction adds strength. Flat box bead guides convert your flat box into an outside corner finisher. - Rugged design built to last - Larger capacity boxes deliver increased productivity - improved...

Blue Line is proud to announce the release of a new model Flat Box - the Blue 2. Although Blue Line USA had made several changes to the old design, it was essentially the same as the Premier box from 20 years ago - time for an update! The Blue 2 boxes...

Give yourself an edge over the competition, the Blue Edge! Get The Blue Edge! Transform your Blue Line Flat Box into a quick and easy way to finish out any style of outside corner: metal, plastic or paper face bead. Installation is quick and easy,...

Rubber gasket bar system and rubber roller wheels stay flexible to provide a soft ride even when dirty. Pivoting axle helps keep the box on the wall with less effort providing you better control and accuracy. Here's one tough box. The adjustable,...

Rubber gasket bar system and rubber roller wheels stay flexible to provide a soft ride even when dirty. Pivoting axle helps keep the box on the wall with less effort providing you better control and accuracy. Here's one tough box. The adjustable,...

Columbia FatBoy Flat Box (COLM-8FBB,10FBB,12FBB) "Perfect for the drywaller that wants a larger, stronger box with greater mud capacity to load joints faster with less trips to the pump. Just exactly how much more does a FatBoy hold? An 8" FatBoy holds...

Rubber gasket bar system and rubber roller wheels stay flexible to provide a soft ride even when dirty. Pivoting axle helps keep the box on the wall with less effort providing you better control and accuracy. Here's the toughest boxes around. The...

Level 5 Mega Flat Boxes offer the same features and quality as the standard flat box and can cover up to 50% more area with each fill-up. Less trips to the pump means more production! This 7" MEGA Flat Box is fully adjustable with up to 10 settings...

These Level 5 Flat Boxes have an adjustable crown dial that ensures the precise amount of mud. Deeper back spine allows for easier operation. Hard coat anodized for durability. Lid opens extra wide for easy clean-up. Built for performance and value.

Level 5 Mega Flat Boxes offer the same features and quality as the standard flat box and can cover up to 50% more area with each fill-up. Level 5 Mega Flat Boxes offer the same features and quality as the standard flat box and can cover up to 50% more...