Null sweat, though. Chem-sniffers and metal detectors don’t pick up my "click-stick," a collapsible baton like the Jap cops use. It’s made of a modified densiplast that’s as dense as iron and lets it pack some heft, but it’s totally non-magnetic. Collapsed, the stick’s a cylinder about twelve centimeters long, and just the right diameter for a comfortable grip. Snap your wrist and it extends with a triple click out to about thirty centimeters, with enough mass in the bulbous tip to crack bone.