It is a Gypsum Board Joint Tool 

Made of high strength PP (Polypropylene Plastic), with ergonomic handle design, this tool is comfortable and easy to use.

Efficient and time saving, the Banjo fills and levels joints between gypsum boards, to prevent future cracks.

Insert the taping mesh inside the tool, then fill it with putty and finally pull the tool over the joint.

* It will spread and tap the putty and mesh together over the joint as a sealant.

* It works for all types of partitions, walls, inner corners and edges.

* It applies putty in 4 adjustable thickness levels and insures a uniform result.