①. Durable---- Spikes and studs are made of alloy, and screws are made of iron. Each has a smooth surface with a fine finish, no casting lines, and is crafted with fine workmanship for durability. ②. Sizes and Colors ---- Available in 5 different sizes of tree spikes and 70 sets of screwback studs in various sizes, along with 2 pieces to meet different needs for leathercraft DIY projects. Installation is easy even for beginners. ③. Easy to Use ---- Comes with installation tools. These are quite sharp and may be liked by users. Just punch a hole and screw them on. They can look cool with DIY projects and are worth considering. ④. Wide Application ---- Suitable for decorating belts, jackets, dog collars, garments, clothing, and other leather craft DIY making. ⑤. colour: silver ⑥. Material: Metal ⑦. Contents: - 32 x Tree Spikes, Size: 8 x 12 MM (5/16 x 15/32 inch) - 16 x Tree Spikes, Size: 6.5 x 20 MM (1/4 x 25/32 inch) - 8 x Tree Spikes, Size: 10 x 20 MM (3/8 x 25/32 inch) - 8 x Tree Spikes, Size: 10 x 24 MM (3/8 x 15/16 inch) - 6 x Tree Spikes, Size: 10 x 27 MM (3/8 x 1 5/64 inch) - 70 x Screwback Studs, Height: 15/64 inch - 1 x Hole Punch - 1 x Screwdriver - 1 x Clear Storage Box Only the above items are included; others are not. ⑧. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3cm.