1 Lumenok Bright Light Half Moon Nock for Crossbow

Like tracer bullets for your bow! Bright Lumenok light comes on when arrow is released, then stays on until you turn it off. Gives you a good look at your arrow flight, from release to impact. Simply remove your nock and install the Lumenok. Lightweight... adds only 22 grains of weight to arrow; 3V lithium batteries have 5-year shelf life, stay lit continuously for 40 hrs.; Uni-nock design; 2 1/2" long.  ONE NOCK PER PACKAGE, NOT AS SHOWN. MULTIPLE NOCKS ALSO AVAILABLE.