I too had never had a pop socket; if that’s what they’re called. I bought 2 extra ones just so when my original BLM wears out, or I get a new phone, I’ll already have replacements. I especially like that it’s a quiet way of letting people know right out-of-the-gate where I stand on an absolutely critical issue. The quality of the product is excellent. Thanks so much for producing these and making them available to all of us.