Type: Allen Wrench - MetricSeries: profiTOOLS R/C ToolsTip size: 5.0mmTip length: 120mmHUDY profiTOOLS are based on highly-successful HUDY Professional Tools used by RC factory teams and world champions. Each tool has a special, CAD-designed tip made of world-renowned HUDY Spring Steel to very precisely fit the corresponding fastener, allowing unmatched torque and long life. New lightweight, comfortable molded hollow handles with machined hubs are designed to allow easy tip exchange.