One size fits all

simply pull the suction nozzle off the unit and while holding the black knob attached to the end of the rod tightly with one hand

fully collapsed

Construction: Lightweight and durable

the headphones also feature a headband and ear cushions

Teknetics Delta Metal Detector with 8" Concentric Coil Crevice Tool One size fits allThe Teknetics 4000 Delta is the Latest Powerful Metal Detector from the world renowned Teknetics brand of Quality made metal detectors. The " Delta " has state of the art features that are found in metal detectors costing hundred's more. The "Teknetics 4000 Delta has many Great Features including: Waterproof 8" open searchcoil,Low Frequency of 7. 8kHz to alert you to literally to every type of treasure, a Large control housing featuring push button