The bottle opener is made of premium aluminum alloy. It is durable for wear resistance and colorfastness. They are lightweight, small size, easy to carry and use. The size of each bottle opener is 2.56(L) x 0.47(W) inches, each weight is about 0.39 ounces/10.5g. Each bottle opener comes with a key ring, it can be hung on your key chain directly. It is very convenient to carry.bOnly need a little pressure, you can open the lids of beer bottles easily. Super simple and practical. These bottle openers with keychain is colorful, stylish, and looks pretty cute. Each bottle opener is so small and light that we can put them in everywhere what we hope easily. Such as our pockets, handbag, backbag, desk, etc. Very suitable for home use, parties, restaurants, wine bars, convenience stores, hiking, camping, and traveling, etc.