GRIP Hardware Hangers & Holders Quacker Clamp Watch this product and we will notify you once it is back in stock. The product is now watched We will notify you once the product is back in stock again. E-mail Watch this product Your personal information is processed in accordance with our privacy policy. Quacker Clamp Quacker ClampAlso known as the Duck Bill or Platypus Clamp. This clamp is ideal for positioning foam core or bead board.