The 
45NRTH Stud Wrench seats and removes studs for all 
45NRTH studded tires. Whether you need to replace studs on a worn tire or need to customize the stud pattern on a customizable tire, this stud wrench will make that process a breeze. 
- POM-injected handle 
 - Stainless steel barrel 
 - Thumb and index finger grips for more comfort and control 
 - Compatible with studs that have a 3.5mm or smaller shaft