Fangrui Product Details 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. 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. 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. Wide Application ---- Ideas For Decorating , , Belts, Jacket, Dog , Garments, Clothing And More Leather Craft Diy Making. Colour: Silver Material: Metal Contents: 32 X Tree Size: 8 X 12 Mm ( 5/16 X 15/32inch ) 16 X Tree Size: 6.5 X 20 Mm ( 1/4 X 25/32inch) 8 X Tree Size: 10 X 20 Mm ( 3/8 X 25/32inch) 8 X Tree Size: 10 X 24 Mm ( 3/8 X 15/16inch) 6 X Tree Size: 10 X 27 Mm ( 3/8 X 1 5/64inch) 70 X Screw Height:15/64inch 1 X Hole Punch 1 X Screwdriver 1 X Clear Storage Box Only The Above Content, Other Are Not Included. 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.