[Sharp Steel Probe and Easy to Use]:It is constructed with a slim stainless-steel probe and easily pierces wire insulation to check circuitry, even in hard to reach areas [Sharp Steel Probe and Easy to Use]:It is constructed with a slim stainless-steel probe and easily pierces wire insulation to check circuitry, even in hard to reach areas [Long Spring Wire and Stable]: Long spring wire can stretch to about 1 meters, and the wire is thick so that the wire will not burn when the part temperature is increased [Fast Respond Indicator Light]: This truck circuit tester pen is equipped with a sensitive indicator light, it will quickly respond once the truck circuit tester pen probes electricity; If the indicator light is on, there is electricity [Volt Between 6-24V]: he test range of this vehicle volt circuit test probe pen is from 6V to 24V, the most common voltage range of vehicles in the market; It is great for voltage regulators, fuses, switches, broken wires, mechanics, electricians, and more [Premium AS and Carbon Steel Material]: The handle of this electrical wire circuit tester is made of high quality AS material, won t easily get broken, anti electricity and safe to use; The probe is made of hardened and tempered chrome plated carbon steel, anti rust and very sharp Specification: Material: AS plastic, Carbon steel Handle Color: As the picture show Pen Length: 17.3cm / 6.8inch Probe Length: 8.3cm / 3.3inch Line Length: 96cm / 37.8inch Package Weight: 118g Quantity: 1pc Clamp Capacity: 20 AMP Bulb: 3 Watt Bulb (Replaceable) Voltage Range: 6V-24V Package included: 1 x Electrical Wire Circuit Tester