The Streamlight Stylus, Matco Part No. M65018, is an all-purpose inspection tool with a penlight design that helps illuminate hard to reach areas under the hood and within the undercarriage of automobiles. According to the company, what distinguishes the Stylus from other lights on the market is its size and power. The Stylus is also built with tempered aircraft aluminum casing and is waterproof. The Stylus: Is 6.21" in length and .38" in diameter. Delivers up to 12,600 millicandles of power. Is bright enough to illuminate dark, confined spaces. Requires no warm-up time. Offers momentary and constant on switching for user convenience. Is equipped with virtually indestructible, long lasting (up to 100,00 hours) LED light. Is available with blue, green, red or white LED light. Comes with a built-in pocket clip for hands-free lighting.