The SparkLite GLO is easy to use and great for campers, hikers and survival situations. The durable, plastic handle glows in the dark which makes it easy to locate from dusk till dawn.Works when wetLightweight, compact and easy to storeIncludes steel-toothed flint shaver with integrated bottle opener50mm ruler embossed on the shaver1:100000 ratio 5km ruler on the opposite sideExpose handle to light source for 2 hours of glow