Shown here are the Trow Holden tools most frequently used for restoration projects, including some tools specifically designed for mortar removal. For more information related to repointing and masonry restoration, visit our Pneumatic Mortar Removal Guide. Sep 01, 2000 The soft lime mortar used in older masonry buildings can be removed with hand chisels in contrast, the very hard mortar used in many modern buildings may require the power of a grinder for removal. The most popular disc grinders for masonry have 4-, 4 1/2-, or 5-inch cutting wheels. The grinder is powered by a small electric motor.