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It is suitable for use with all corded and cordless drill drivers. The Hexagon Adapter connects the hole saw to the power tool with a mandrel. Hexagon adapter with 5/8"-18UNF thread and HSS-G pilot drill bit (2 608 596 119) Width across flats 11 mm, for diameter 32 mm, 1 1/4" - diameter 210 mm, 8 9/32" • Use of Holesaws on Power Tools with a Mandrel • Hexagon Adapter connects the hole saw to the power tool • Suitable for use with all corded and cordless drill drivers