Breaker-grozier pliers, or groziers, are pliers used by glaziers to break and finish glass in a controlled manner, a technique called grozing. They are dual-purpose: a flat jaw is used for breaking out scored glass, and a curved jaw is used for grozing, or nibbling away, flares left along the edge of already-broken glass. Both jaws are serrated so they can grip and remove small flares and points of glass cleanly.
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