The perfect tin to stash all those little notions! The tin measures 6cm x 4.5cm x 1.5cm. HiyaHiya needle grips and cable keys have been designed to help you tighten your interchangeable tips and cables quickly and easily. The cable key is a fantastic tool, specifically designed to work with all of our cables and tips. The cable key slots into the lifeline hole to tighten the cable to the tip or tip adaptor to create a smooth and secure finish.