Max diameter of hole(mm):26 Rated power(W):750 Rated speed:500 Percussion rate:2300 Tank capacity:0.6 Fuel mixture:1(2-stroke oil):25(90#gasoline) Ignition: CDL Starting method: Recoil pull cord Petrol hammer drill is powered by the petrol engine. No need to exert the heavy pressure while using, as the percussion does the work. The clutch can slip automatically should the bit become jammed, thus operator will not be sprained against a high torque moment. This function is essential when using the tool in difficult conditions. It is convenint to install and remove the bit with included keyless chuck. Used in the installation of the electrical engineering the installation of the doors and windows, and any operation requiring maximum flexbility when electrical power is not advisable or available.