The Black Crows Duos Junius Ski Poles are a quality adjustable youth pole made of 7075 series aluminum (kids' poles usually use cheaper 5000-series or 6000-series alloys). The Duos Junius uses a twist lock system to adjust between 80 and 105 centimeters, so you can adjust the poles each time your child grows or when you hand them off to a younger sibling.