Acavallo Arena AluPlus Anodized Aluminium Safety Stirrups Size:One Option Hairy Pony Thinning Scissors Hairy Pony Thinning Scissors Amanda Lithgow Horse Head Mug The opening of the stress actuated locking and release mechanism is located a centimetre higher from the tread to ensure that the foot cannot slip out laterally by mistake and to prevent sand and dirt from delaying the opening action of the arm in case of an emergency The aluminium besides giving the stirrup a sleek and elegant appearance is lightweight and extremely durable while the stainless steel protects the tread from corrosion guaranteeing a long life of the product too