Details Smooth adjustment for custom fit Fits 3M™ SecureFit™ X5000 Series Safety Helmets Plastic buckle Easy and quick to use This four-point chinstrap features a plastic buckle and fits the 3M™ SecureFit™ Safety Helmet X5000. The chinstrap is designed with quick and smooth adjustment features for custom fit. 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.