Durable spikes and studs made of alloy, screws made of iron. Each piece features a fine finish with no casting lines, precise workmanship, and long-lasting durability. Available in 5 different sizes of tree spikes and 70 sets of screw-back studs in various sizes, along with 2 installation tools to meet your needs for different leathercraft DIY projects. Easy to install, even for beginners. Comes with all necessary tools for simple application. Simply punch a hole and screw on—no hassle. These spikes are sharp and stylish, adding a cool look to your DIY creations. Ideal for use in a wide range of applications including shoes, belts, jackets, dog collars, garments, clothing, and other leathercraft projects. Color: Silver Material: Metal Package Contents: - 32 x Tree spikes (8 x 12 mm / 5/16 x 15/32 inch) - 16 x Tree spikes (6.5 x 20 mm / 1/4 x 25/32 inch) - 8 x Tree spikes (10 x 20 mm / 3/8 x 25/32 inch) - 8 x Tree spikes (10 x 24 mm / 3/8 x 15/16 inch) - 6 x Tree spikes (10 x 27 mm / 3/8 x 1 5/64 inch) - 70 x Screw-back studs (height: 15/64 inch) - 1 x Hole punch - 1 x Screwdriver - 1 x Clear storage box Note: The package includes only the items listed above. Other accessories shown are not included. Please note that lighting and monitor settings may cause slight variations in color. Measurement error is +/- 1-3 cm.