THE 5-SECOND TRICK FOR RIDDLES

Problem: What operates but hardly ever walks, incorporates a mattress but never ever sleeps, a mouth that by no means speaks, and a head that by no means weeps?Q: With pointed fangs I sit and wait; with piercing drive I crunch out fate; grabbing victims, proclaiming could possibly; bodily joining with an individual bite. What am I?Interviewers ask