Inside Diameter: 6mm(400#) 1/4",outside diameter: 26/64" Tools include: 1 Lower Part Base, 1 German hole punch Tool 400 sets Grommet Eyelets : 100 set Nickle, 100 set Gold ,100 set bronze ,100 set Gun Black Easy way to add or replace eyelets in just seconds Use for decorating your fabric, bags, Shirt, shoes, etc. How To install? Step 1.Please prepare the tools that you need(grommet,,hammer,base,hole punch,gasket,install tool,your project). Step 2.Knock hole punch with a hammer and punch hole. Step 3.Make the grommet and through the hole of the leather and let it on base. Step 4.Make the gasket match the grommet. Step 5.Place the install tool on the gasket and beat it with a hammer. Step 6.Make sure well-finished.Easy storage: 1 pc nice German hole punch, 1 pc lower part base, 1 tool and 200 sets eyelets are contained in one storage box, very convenient. Whole set eyelets provide an easy and economic solution for DIY project or repairing shoes ,cloth, clothes,canvas, tarps, tents, awnings etc. Or decorating your fabric, bags, Shirt, shoes, etc. 400 sets Grommet Eyelets : 100 set Nickle, 100 set Gold ,100 set bronze ,100 set Gun Black. Grommet material: brass, are sturdy and resistant to corrosion and rust. Grommet tool kit inside Diameter: 1/4"(6mm), outside diameter: 26/64", post length:5/32".Date First Available: October 3, 2016. Best Sellers Rank: #17,268 in Arts, Crafts & Sewing. Customer Reviews: 4.3 out of 5 stars 664 ratings 4.3 out of 5 stars. : B01LY2L8QN. Batteries Required?: ?No. Batteries Included?: ?No. Item Package Quantity: ?1. Pattern: ?150 sets. Material: ?Brass. Color: ?Mix. Size: ?1/4''. Is Discontinued By Manufacturer: ?No. Item model number: ?4337005520. Country of Origin: ?China. Product Dimensions: ?3.7 x 3.11 x 0.98 inches. Item Weight: ?3.52 ounces. Part Number: ?IN61003. Manufacturer: ?Wenzhou Inton Enterprise.