1. Compatible with mobile phones and tablets, anti-lost design for card taking pins 2. Easy to use: just align the card pin with the SIM card eject slot, push it into the SIM card eject slot, your SIM card will pop out from the device, easy and convenient to use 3. Portable design: The smartphone pin is equipped with a silicone keychain, which is both anti-lost and easy to carry; and it is equipped with a detachable O-ring, which can be hung on the keyring, making it easier to find when needed. 4. Material: 304 stainless steel + silicone 5. Dimensions: card needle about 37 x 8mm, needle thickness: 0.8mm, protective cover about 46 x 12mm 6. Weight: about 2.2 grams/piece