These are one-touch plus snaps that can be attached without tools. Size: 13mm 6 yellow pieces for 326 yen. Thank you. ※First, there's something I'd like to tell you. Because the seller is a bit clumsy, I try to be careful before shipping to make sure the number of parts is correct, but there may be inspection errors. Please check the items when you receive them. I cannot respond to inspection errors after evaluation, so please let me know of any issues before evaluation. These are one-touch plus snaps that can be attached without tools. Simply make a hole where you want to attach them and snap them together with your fingers (^-^) If it's hard, press them in on a flat table, etc. The snap may not fit well if the fabric is thin. One set (piece) consists of 2 heads, 1 genko (socket), and 1 spring. No instructions are included, please refer to the second image. Other colors are also available. There are 12 colors: white, red, blue, black, pink, dark pink, light blue, yellow, yellow-green, brown, lemon yellow, and beige. You can mix and match, so please comment. 6 pieces for 326 yen 10 pieces for 522 yen, repeat discount 502 yen 15 pieces for 722 yen, repeat discount 692 yen 20 pieces for 922 yen, repeat discount 882 yen 25 pieces for 1122 yen, repeat discount 1072 yen 30 pieces for 1322 yen, repeat discount 1262 yen 35 pieces for 1522 yen, repeat discount 1452 yen 40 pieces for 1722 yen, repeat discount 1642 yen 45 pieces for 1922 yen, repeat discount 1832 yen 50 pieces for 2122 yen, repeat discount 2022 yen 55 pieces for 2322 yen, repeat discount 2212 yen 60 pieces for 2522 yen, repeat discount 2402 yen If you want to purchase 10 or more pieces and are a repeat customer, please comment. Material: Plastic