A grozing iron is a metal tool for removing the rough edges from sheets of glass. It is sometimes called a “crimping iron” or “glazier’s nippers” in mundane blazons. The grozing iron is a period charge, found in the arms of Kaylewaye or Kelloway, mid-16th C. [Bedingfeld 92; cf. BSB Cod.Icon 291:75]; they were borne (without authority) by the Worshipful Company of Glaziers in 1588 [Bromley & Child 116]. The illustration shows a grozing iron fesswise.
Marya Glasscutter bears: Per pale vert and sable, a grozing iron fesswise argent.
Kenneth of the Grove bears: Sable, two grozing irons in saltire within a bordure embattled argent.
Brynniulfr Herleifsson bears as a badge: Two grozing irons in saltire sable and vert.