The visor screws are a specific accessory for HEBO brand trial helmets that are used to secure the visor to the helmet and ensure that it stays in place during use. They are made of durable and resistant stainless steel, easy to install and adjust and compatible with Trial, Zone 3, Zone 3 Code, Zone 3 Square, Montesa Team, Montesa Classic Zone helmets by HEBO.Referencia: HCR1005