Marshalltown 4-in Steel Putty Knife in the Putty Knives department at Lowes.com
Purdy Putty Knife - Flexible or Stiff – Next Day Paint
Premium Flexible Putty Knife - 38mm -150mm - Tools from Build and Plumb UK
HOGARD 4" Putty Knife | The Best Jointing Knife for Your Drywall Tools | Made of Stainless Steel | Perfect Spackle Knife or Pocket Metal Paint Scraper Knife : Amazon.co.uk: DIY & Tools