Capable of drilling to depths up to 250 ft when used with 4.75 in. casing, LS™250 MiniSonic™ has wide 600 mm rubber tracks that provide low ground pressure of 4 psi. Interlocked rotation barrier automatically slows head rotation when barrier is open, while articulated mast and wiggle tail enable mast to be positioned precisely over hole. In addition, rod presenter allows rod and casing to be loaded horizontally, with actuator that then presents rod and casing vertically to head.