ITEM NAME:100 Pcs 15mm Car ATV Screw In Tire Studs Snow Anti-Slip Stud Snow Tire Spikes 100pcs 15mm Ice Road Snow Spikes Winter Car Truck Tire Tyre Anti-Slip Screw Stud Accessories SPECIFICATIONS.(Item included: 100x Tire Stud Screws. 1) Drill (using a very small bit) down from the center of chosen knob into the tire. 2) Drill a screw up from inside to out. If the angle isn't perpendicular to the tire, it will stick out one side or the other.
