The Flexi Retractable Leashes Never Slacken As They Are Always Subject To Sufficient Tension. With The Help Of The Intergrated Braking System The Animal Is Always Under Control. In Addition A Lock Button Can Fix The Length Of Leash When Walking ' To Heel'. The Mini 1.3 Has A 3M Cord & Is Suitable For Small Dogs Up To Approx 8 Kg.