Marshalltown M3510D 10" X 3" BS Taping Knife - DuraSoft Handle

Product details:

This 10" x 3" Drywall Taping Knife is available with either a blue steel flexible blade or a stainless steel blade.

It has a comfortable Durasoft handle, and is primarily used for smoothing jointing tape in drywall applications.
 

This is the blue steel flexible model.