Jagwire Needle Driver Insertion Tool Installing hydraulic hose fittings shouldn't be done using a hammer. The delicate brass fittings in the end of a hydraulic hose can be easily crimped or not installed true to the end of the hose, resulting in undesirable brake performance. The Jagwire Needle Driver is a simple-to-use tool as it magnetically secures the end of a hydraulic hose and allows for easy and gentle installation of hose fittings. The double-ended driver can be switched to work with either standard or torqued needles. Cleanly and gently installs hose fitting Magnetically secured double-ended driver is compatible with standard or torqued needles Adjust hose clamp tension using a 3mm hex wrench | Jagwire | Needledriver Insertion Tool Black