This Monkey Fist Keychain is made with 550 paracord, 1" key ring and contains a heavy 1" steel ball in the inner core.  It will definatley slow down an attacker.  550 Paracord is waterproof, will not rot or mildew, and can be used to assist in many emergency situations. Paracord is ideal for camping, boating, hunting, hiking, and much more. The cord can be used for anything requiring great strength & durability. The core contains seven (7) removable inner strands that can be used for fishing line, bow string, sewing thread, tripwire, nets, traps and other emergency or survival situations. Other colors are available upon request...Several colors are available.