Putty Knife ideal for Puttying windows, Removing loose putty, Scraping Paint, Removing Loose Paint, Removing vinyl or paper wall covering, Patching dents cracks holes in plaster.
Taping knife ideal for Patching large areas, Sealing drywall joints.
A putty knife is a specialized tool used when glazing single glazed windows, to work putty around the edges of each pane of glass. An experienced glazer will apply the putty by hand, and then smooth it with the knife. Modern insulated glazing may use other ways of securing the glass to the window frame.
A spackle knife (called a scraper in British English, also known as a spatula in American English) is also commonly called a "putty knife", and is used for scraping surfaces or spreading material such as plaster in various construction trades.
A taping knife drywall tool with a wide blade is used for spreading joint compound, also known as "mud". It can be used to spread mud over nail and screw indents in new drywall applications and is also used when using paper or fiberglass drywall tape to cover seams. Other common uses include patching holes, smoothing wall-coverings and creating specialty artistic wall finishes.