bluerock model 12z1 t/s core drill package deal 2-speed w/tilting stand concrete coring & vacuum pump bluerock bluerock model 12z1 t/s dual speed core drill, high output concrete coring drill, with tilting stand, rolling base, vacuum base and vacuum pump specifications: max drilling diameter: 12". rated voltage: 110v. rated frequency: 50-60hz. rated input power: 2600w. ce certificate. dual speed: 460rpm/900rpm structure and features: two-gear rotary speed is designed for drilling different size holes. top gear is for small/medium drill bits. bottom gear is for larger drill bits. the drill is fitted with an outer regulating safety clutch. has an overload protection switch to protect the machine and user. double insulation. adaptable water spigot for "wet" drilling. this is a heavy duty drill with high output. tilting stand. rolling base. vacuum base. vacuum pump. this is a brand new 12" coring drill with tilting stand and rolling base. it's a high quality unit with a dual speed function. let us know if you have any questions before or after purchase. thanks for shopping! note: the drill bit pictured is not included in this sale (although it is for sale in our store). vacuum bases are not designed to work in every environment or application. very rough surfaces, cracks or very uneven surfaces will reduce suction. optimal adhesion is achieved on smooth and flat concrete with a strong vacuum pump. for shipping outside of continental united states please contact for shipping quotation, if not otherwise specified in item description.