Desco Jewel® MagSnap Adjustable Wrist Strap, Metal, Red-White-Blue Features:

• Magnetic Connection Between Wrist Band and Coil Cord
  Superior electrical connection to eliminate intermittent failures of traditional snaps; extends the lifespan of the wrist strap. Maintains 1-5 pound release to prevent accidental disconnects and increased safety.
• Metal Expansion Wristband
  Used with a coil cord to create a path-to-ground for an operator with resistance <3.5 x 10⁷ ohms per the required limits of ANSI/ESD S20.20, tested per ANSI/ESD S1.1 or ESD TR53.
• Patented¹ Size Adjustment
  Designed to allow the operator to adjust the size (circumference: 5.5" - 13") to their wrist.
• Highly Visible Color
  Bright colors allow supervisor to see that worker is wearing wrist strap.
• Medical Grade Series Stainless Steel Backplate and Links
  Creates a more reliable path-to-ground² for the operator.
• Solid Stainless Steel Machined Snap Stud
  Solid material will provide a consistent 1-5 pound release to prevent accidental disconnects between wristband and cord.
• Date Coded
  Provided so that the lifespan of the product may tracked and to ensure quality control.
• UL Listed
  Meets UL requirements to ensure operator safety.
• To be used with MagSnap^® Coil Cord
  
  
• Made in the United States of America

References:
1. Patent Number 5,568,351 - Adjustable Antistatic bracelet with snap-assembled permanent
2. Metal expansion bracelet style wrist cuffs may trap moisture underneath and can be more effective for people with dry skin." [ESD Handbook TR20.20 section 5.3.2.4.3]