This holesaw set includes 11pc tool steel cutting cups sizes: 19mm (3/4") 22mm (7/8"), 28mm (1-1/8"), 32mm (1-1/4"), 38mm (1-1/2"), 44mm (1-3/4"), 51mm (2"), 64mm (2-1/2"), 76mm (3"), 102mm (4"), 127mm (5"), 1pc 3/8" mandrel, 1pc 1/4" drill bit with mandrel , 1pc drive plate, 1pc hex wrench, 1pc blow moulded storage case. Use to cut clean, accurate holes through up to 25mm thick drywall, wood and plaster.