Durable Spikes and Studs Made of Zinc Alloy, Screws Made of Iron. Each Spike is Smooth with a Fine Finish, and with no Casting Lines,Fine Workmanship and Durable.Sizes and Colors Assorted 5 Different Sizes Tree Spikes, 70 Sets Different Designs and Sizes Screwback Studs Along with 2pcs Tools to Meet Your Needs for Different Leathercraft DIY Project.Easy Installation Even You're a New Hand.Easy to Use Coming with Install Tools. These are Pretty Sharp and You Will Love Them Just Need Punch a Hole and Screw on.They Will Definitely Look with Your DIY Project. Wonderful Products That You Can't Missing.Wide Application Amazing Ideas for Decorating Your Bags, Shoes, Belts, Jacket, Dog Collar, Garments, Clothing and more leather craft DIY making.colour: silverMaterial: MetalPackage Contents:32 x Tree Spike Size: 8 x 12 MM ( 5/16 x 15/32inch )16 x Tree Spike Size: 6.5 x 20 MM ( 1/4 x 25/32inch)8 x Tree Spike Size: 10 x 20 MM ( 3/8 x 25/32inch)8 x Tree Spike Size: 10 x 24 MM ( 3/8 x 15/16inch)6 x Tree Spike Size: 10 x 27 MM ( 3/8 x 1 5/64inch)70 x Screw Height:15/64inch1 x Hole Punch1 x Screwdriver1 x Clear Storage BoxOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/ 13cm.