Government Tender Published for ELECTRICALLY OPERATED DOUBLE INSULATED ROTARY HAMMER MACHINE WITH 13MM DRILL CHUCK . Power Input : 800 W ,Impact Energy : 0 - 3.0 J, Impact Rate at Rated Speed : 0 - 4000 bpm , Rated Speed : 0 - 900 rpm , Drilling Diameter in Concrete : 4 - 26 mm ,Max. Drilling Dia meter in Masonry : 68 mm Core Cutters ,Drilling Diameter in Steel : 13 mm ,Tool Holder : SDS-plus ,Weight : 2.7 kg ,Infinitely Variable Speed Control : Yes , Forward / Reverse Operation : Yes , 3 Mode Switch : Yes Make: Bosch or equivalent] in Tamil Nadu