• Semi-automatic • S41enhanced mounting bar provide long time and high strength service without any mechanical deformation. • Equip with tire press help kit, it makes the job more quickly and easily. • Advanced bead breaker arm structure design, the blade follows bead to inside rim contour automatically and with a protection cover, it is more safe. • With 4 clamping jaw covers, it offers a complete protection to the rim and tire. • lt can equipt with Auto-helper makes mounting and demounting low profile tire more quickly and easily.