What You Get: Package includes 100 pieces black spikes with 1pcs spike wrench, convenient for you to replace your shoe spikes. There are enough quantity for your daily use. Quality Material: These spikes are made of quality hard steel, durable and rust-resist and anti-corrode, ensure you to use for a long time.Easy to match with most of the track shoes, improve your running balance of traction, flexibility and speed. Easy to Use & Replace Spikes: The package includes a spike wrench. It is very easy for you to screw the track spikes into the shoes, convenient to replace the spikes. Ideal for athletic tracks, field and cross country surfaces. Size: 6.35 mm (1/4 inch) in length, tapered and needle-shaped, which increases friction between the sole and the ground and prevents skidding,especially suit for track sprints, long jump,running, outdoor sports activities. Improve Running: If you like running, climbing, or you are a sports enthusiast, this track spikes will help you a lot. This pyramid spikes will add the friction between the shoe sole and ground, thus can resist skid and improve your running speed. Product Description: Features: Material: Hard Steel Size: 6.35 mm (1 / 4 inch) in length Color: Black Quantity: 100pcs Spikes 1pc Spike Wrench Tips: These spikes are sharp. Please install them carefully to prevent injury