Ⅰ. Durable---- Spikes and Studs Made of Alloy, Screws Made of Iron. Each is Smooth with a Fine Finish, and with no Casting Lines, Fine Workmanship and Durable. Ⅱ. Sizes and Colors ---- 5 Different Sizes Tree Spikes, 70 Sets Different and Sizes Screwback Studs Along with 2pcs to Your Needs for Different Leathercraft DIY Project. Easy Installation Even You're a New Hand. Ⅲ. Easy to Use ---- Coming with Install . These are Pretty Sharp and You Will Love ! Just Need Punch a Hole and Screw on. They Will Definitely Look Cool with Your DIY Project. You Can't Missing. Ⅳ. Wide Application ---- Ideas for Decorating , , Belts, Jacket, Dog , Garments, Clothing and more leather craft DIY making. Ⅴ. colour: silver Ⅵ. Material: Metal Ⅶ. Contents: Ⅷ. 32 x Tree Size: 8 x 12 MM ( 5/16 x 15/32inch ) Ⅸ. 16 x Tree Size: 6.5 x 20 MM ( 1/4 x 25/32inch) Ⅹ. 8 x Tree Size: 10 x 20 MM ( 3/8 x 25/32inch) Ⅺ. 8 x Tree Size: 10 x 24 MM ( 3/8 x 15/16inch) Ⅻ. 6 x Tree Size: 10 x 27 MM ( 3/8 x 1 5/64inch) ⅩⅢ. 70 x Screw Height:15/64inch ⅩⅣ. 1 x Hole Punch ⅩⅤ. 1 x Screwdriver ⅩⅥ. 1 x Clear Storage Box ⅩⅦ. Only the above content, other are not included. ⅩⅧ. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.