Specification Material: Carbon Steel Arbor Length: 4cm / 9cm Smooth cutting edges Cutting Depth: 25 mm Especially impact resistance Adapted Machines: Electric drill, Impact drill, Bench drill etc Package Size: 29*14*6 Package Weight: 455gm Package Content 13 × Carbon Steel Hole Saw [Diameter: 3/4"" (19mm), 7/8"" (23mm), 1"" (25mm), 1-1/8"" (28mm), 1-1/4"" (32mm), 1-1/2"" (38mm), 1-3/4"" (44mm), 2"" (51mm), 2-1/2"" (63mm), 3"" (76mm), 3-1/2"" (89mm), 4"" (102mm), 5"" (127mm)] 2 x Mandrel 1 × 2.5mm Allen key 1 × Install Plate (Drive plate) 1 × Package Box