Kupo KCP-616 Duck Bill Clamp is a practical grip solution for holding foamcore, reflector boards, flags and bounce cards securely in place. Also known as a quacker clamp, platypus clamp or onkie bonk, this clamp is designed for fast setup on flat surfaces while helping protect your panels with adjustable tension.

Featuring a 177.8 mm duckbill plate, the Kupo KCP-616 Duck Bill Clamp uses a metal jaw to grip flat items up to 114.3 mm thick. Its dual-sided plate includes one white side for use with white reflector boards and one black side suited to darker, non-reflective surfaces.

The clamp includes a steel 16 mm baby stud with an embossed neck design, allowing secure mounting to either a baby receiver or a grip head. Built with an aluminium plate and steel clamp, it weighs 0.89 kg.

  • Suitable for foamcore, boards, flags and cards
  • Quick to attach to flat surfaces
  • Adjustable tension helps reduce damage to panels
  • Holds flat items up to 114.3 mm thick
  • White side for white reflector boards
  • Black side for darker, non-reflective boards
  • 16 mm baby stud for mounting to a baby receiver or grip head

Specifications: Colour: White and black plate, silver clamp; Material: aluminium plate and steel clamp; Mounting: 16 mm baby stud x 1; Maximum flat item thickness: 114.3 mm; Weight: 0.89 kg.

ColorWhite & Black(Palte)/ Silver(Clamp)
MaterialAluminum(Plate)/ Steel(Clamp)
Mounting5/8" (16mm) Baby Stud x 1
For4.5" Thick Flat Items
Weight0.89 kg (1.9lb)

Manufacturer Warranty


This product comes with a

24 month Australian warranty

from Kupo Australia

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* Dispatch timeframes are indications only and may vary for multiple quantities. Timeframes are updated regularly during normal business hours.