[Features]· For drilling holes in steel sheets and stainless steel with thickness up to 35 mm / 50 mm.· Uniquely developed special blade shape.· 35SQ: Capable of machining steel sheet up to 35 mm thick and holes up to 35 mm in diameter.· 50SQ: Capable of machining steel sheet up to 50 mm thick and holes up to 65 mm in diameter.· Uses a center pin system.· Positioning is easy, and the core automatically ejects after punching is complete.· Effective in a wide range of fields including bridges, construction, can manufacturing, shipbuilding, and plants.· Using a dedicated shank, it can be used with magnetic drilling machines, upright drilling machines, radial drilling machines, lathes, and milling machines.