Star-M Replaceable Blade Set Screw (1pc)

Range in size 30mm to120mm. With the use of Long Bar 200mm or 300mm as an optional attachment, drilling 200mm or upto 300mm diameter is available. Smooth and speed work by twin-blades. Use the hex wrench in the attachment to adjust the sizes. Suitable for Hard wood and for cement board. Usage : Wood, Cement Board, Hard wood Recommended tool(s) : Electric Power Drill RPm Range - Bar Length 120mm： Less than 1,500 rpm - Bar Length 200mm： Less than 600 rpm - Bar Length 300mm： Less than 600rpm Material(s) - Body：High Carbon Steel - Center Drill：High Carbon Steel with T.C.T. - Replaceable Blade：T.C.T. Capacity - Bar Length 120mm：Hole sizes 30mm - 120mm - Bar Length 200mm：Hole sizes 30mm - 200mm - Bar Length 300mm：Hole sizes 30mm - 300mm Applicable depth：Single face 25mm /Both face 50mm