Product Quantity: 1pc Color: blue Big Open JawBuilt with 45mm/1.77 inches large open jaw,it is very easy for you to clamp it on measured thick wire. Convenient Clamp AdaptorCompared with buying a delicate and expensive clamp meter,getting a clamp accessory for your DMM is much wiser.It provides you more freedom.the display will not constrain to where you gauge current,but anywhere you want,more friendly to aerial workers,guaranteeing your safety Wide RangeA clamp-on-meter can extend the measurement range.It can be used to test AC/DC amp up to 600A.Note:The flow of electricity can only be measured in one direction at a time,or the currents in opposite directions will cancel each other out,causing wrong measurement results. Easy to OperateIt is very inconvenient to break the circuit when measuring current.However,with a clamp device,you can measure current with ease.Just put the jaw of the clamp adaptor around the insulated cable under tests and the current is displayed on you digital multimeter.