The inside and outside cutters ensure clean results even in thin or fibrous materials. Adjustable from Ø 30 mm to 120 mm, with an additional arm for holes up to Ø 300 mm. Resharpenable HSS blades, cutting depth of 28 mm (56 mm if cutting from both sides). Anti-slip cylindrical shaft with three chamfers Ø 10 mm for brace or machine, two centring pins. Driven by a drill with speed control. Made in Japan. With instruction booklet.