9mm Tire Studs for Boots, 400pcs Carbide Screw Anti-Slip Studs for Bicycle,Winter Shoes,Bike,Motorbike,Reusable Anti-ice Snow Spikes with Installation Sleeve

Specifications:Name:Wheel Tyres StudsMaterial: Tungsten Steel AlloyItem Weight: 150g / 5.29ozInstallation: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. Do one hole and screw at a time.3.Put duct tape over the screws on the inside of the tire. Sometimes it is best to use two layers of tape.Please pay attation:It's important for choosing right size, you must to know the depth on pattern of tread rubber to your tire. The depth must longer than 9mm.Package List:400pcs x Tires Studs1pcs x Installation Seelve

• Easy to Install and remove: they could be disassembled from the tires after winter
• Application:Screw studs for Boots,Winter Shoes,Bicycle.(this item is small size,if your tires are bigger,please choose the others.)
• Material: 1.Pin of studs: 100% tungsten carbide; 2.Body of studs:carbon steel;(The Part of Nail Core） 3.Surface of studs:Galvanized(these tire stud screws are strong and durable in use)
• Anti-slip:Worked well on ice driveway.
• Demension:4mm(Diameter)x9mm(Height)