22mm Circular Round Hole Punch Knockout Die — Stainless Brewing Tool

The 22mm Circular Round Hole Punch Knockout Die is a precision hand tool designed for cutting clean, consistent 22mm diameter holes in plastic lids, caps, keg ports, fermenter bungs, and other brewing vessel components. It is the ideal tool for homebrewers who need to fit grommets, bulkhead fittings, thermometer ports, or gas/liquid connections to vessels that don't come pre-drilled to the required size.

The knockout die design uses a bolt-and-nut mechanism to draw the cutting die cleanly through the material, producing a smooth, round hole without cracking, tearing, or deforming the surrounding plastic. This results in a cleaner hole than drill bits alone, particularly in thin or flexible plastic lids where drill bit wobble can cause irregular cuts. The 22mm diameter is the standard size for a wide range of brewing grommets and bulkhead fittings.

Features & Use

• 22mm cutting diameter — standard size for brewing grommets and fittings
• Knockout die mechanism — clean, crack-free holes in plastic
• Ideal for fermenter lids, keg caps, and vessel modifications
• No power tools required — hand-operated bolt mechanism
• Durable steel construction

Quick Facts

SKU: KL10832 | Hole diameter: 22mm | Type: Knockout die / hole punch | Material: Steel | Operation: Hand-operated