1) The instrument used to stir the malt in the mash-fat.
1508 De xijd pro j lez toobe pro brasio, lez maskroder, et scromes, York. The word ‘masker’ is found in some inventories, a regional form of masher: it may have been used in brewing but that is not always evident in the contexts in which it occurs: 1620 2 maskers, 2 little tubs, Bingley
1636 Item, one masker and a stoole xvd, Allerton near Bradford. See ring sieve for 'rother'.