The SPI spiral hoses are ideal for air tools used at varying distances from a fixed air outlet and works best in combination with a balancer. They are easily stretched and retracts immediately when released. When used with hand-held tools, its self-storage principle ensures that the hose is kept off the floor and out of the way of the operator. The SPI 1 and SPI 2 models have ball bearing swivels fitted on the long hose side to allow complete rotation. All spiral hoses, except the SPI4, are fitted with plastic spring guard.