3 mm thumb punch with black thumb — creates a clean 3 mm hole in poly tubing for installing micro barbed fittings (1/4" barb). Push the pointed tip into poly tubing wall to create a hole for micro barbed fittings. Works best when tubing is cooler than 80°F.
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The RKP3 is a 3 mm punch tool for creating clean holes in poly tubing to install micro barbed fittings (1/4" barb). Simple to use — push the pointed tip into poly tubing wall to create a hole for micro barbed fittings.
Key Features & Benefits
3 mm hole — sized for micro barbed fittings (1/4" barb)
Easy to use — no special skills or setup required
Tip: Works best when tubing is cooler than 80°F; cold tubing punches cleanly while warm tubing may stretch