Speed control on this thing has two speeds....off......full on. Makes it almost impossible to start a hole where you want it and makes it very dangerous if the bit binds. After about 15 minutes of use the overload breaker on the thing trips almost immediately when power is applied and any pressure is applied to the bit. Barely made it through two 2 1/2 inch holes in 3 inch thick non reinforced concrete. Terrible item and definitely not worth the money. Use your money to rent a quality drill.Update: After communicating problems to seller they sent a replacement unit that seems to be free of the problems my original unit had. Have to say they made good on their product. Updated to four stars since they did respond promptly.
United States 
Vevor Customer 
