The eyelet is made of high quality material with gunmetal . It is especially made for DIY kydex sheath. With a compatible eyelet hole punch tool kit to smooth and . Kindly remind, the punch tool is easy to get , but the does not effect the function. Please do not buy if you mind! And please clean and lubricate after using.Thank you! 6MM EYELET: It is perfect for DIY 1.5mm kydex sheath. And also suitable for kydex sheath 1mm-1.8mm. :Metalworking Type:Combination Application:Household Tool Set color:Photo color Material:Metal size:Inner diameter 6mm, overall length 6mm Package Contents: 50 x Eyelet 1 x Punch Tool Kit Only 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 +/- 1-3cm.