Details Patented selector function allows you to switch between EN397 or EN12492 safety standards Smooth adjustment for custom fit Fits 3M SecureFit™ Safety Helmet X5000 Easy to attach, use and adjust 3M™ Standard 4-Point Chin Strap X5-S4PTCS2 is included in 3M™ SecureFit™ Safety Helmet X5000 series and can also be purchased as a replacement. Our adjustable chin strap features an exclusive selector function to switch between EN397 or EN12492 safety standards. Our chin strap is easily adjustable and has a plastic buckle. This four-point chinstrap features a plastic buckle and exclusive selector switch. When used with the 3M SecureFit™ Safety Helmet X5000 the selector located in the chinstrap allows the user to choose either EN397 or EN12492 depending on the safety requirements in the workplace. The chinstrap is designed with quick and smooth adjustment features for custom fit.