Hand-held rotary power saws are used frequently to cut openings in masonry walls, in demolition work, and sometimes to cut brick or block for new walls. Because they are portable and usually don't require water, these saws come in handy whenever a quick cut through masonry is needed. Before selecting from among the many available models, consider these questions: What kind of power is available onsite? How much power do you need for the job? What size saw fits your needs? What other features do you want in a saw? This article describes air-powered saws manufactured by Chicago Pneumatic Tool Co., CS UNITEC Inc. and SAWTEC Inc.; electric-powered saws manufactured by Hitachi Koki USA Ltd., Bosch/S-B Power Tool Co. and Milwaukee Electric Tool Corp.; gas-powered saws manufactured by Husquvarna Forest & Garden Co., Makita USA Inc., Partner Industrial Products , Target and Stihl Inc.; and hydraulic-powered saws manufactured by GDM Inc. and Stanley Hydraulic Tools.