ITEM NAME:100pcs 9mm Steel Wheel Stud Screw Snow Tire Spike for Car Bicycle Nail Anti-S BX Description: Application scenario: all kinds of cars, SUVs, snowmobiles, motorcycles, bicycles and other Can easily install and remove this new type of tire bolt without professional tools If it is not winter, it can also be removed from the tire. You can store these bolts for reuse next season. Installation: 1. Drill down (a very small point) from the center of the selected knob into the tire. 2. Drill a screw from the inside out. If the angle is not perpendicular to the tire, it will extend out on one or the other side. 3. Drill and tighten one hole at a time. Wrap the tape around the screw on the inside of the tire. Sometimes it is best to use two layers of tape. Note: 1. Please allow 1-3mm error due to manual measurement. Please make sure you don't mind.Wrap the tape around the screw on the inside of the tire. Drill a screw from the inside out. If the angle is not perpendicular to the tire, it will extend out on one or the other side. Drill down (a very small point) from the center of the selected knob into the tire.