A cabinet saw is characterized by having an enclosed base. Cabinet saws usually have induction motors in the 3 to 5 hp (2.24 to 3.73 kW) range, single-phase, but motors in the 5 to 7.5 HP (3.73 to 5.22 kW) range, three-phase, are common in commercial/industrial sites. For home use, this type of motor typically requires that a heavy-duty circuit be installed. The motor is enclosed within the cabinet and drives the blade with one or more parallel V-belts, often "A" belts as "A" belts may be ganged without having to be specially selected (otherwise, specially selected sets of light-duty "4L" belts are used). Cabinet saws offer the following advantages over contractor saws: heavier construction for lower vibration and increased durability; a cabinet-mounted trunnion (the mechanism that incorporates the saw blade mount and allows for height and tilt adjustment); improved dust collection due to the totally enclosed cabinet and common incorporation of a dust collection port. Cabinet saws are designed for, and are capable of very high duty-cycles, such as are encountered in commercial/industrial applications. Where some of the advantages of a cabinet saw are desired in a home shop application, so-called "hybrid" saws have emerged to address this need.