Good enough for the price - Presma 223/5.56/308 Aluminum and Steel Ambidextrous Safety Selector Switch

When installed correctly, they fit and work in multiple of my lowers. It’s not a perfect fit. There’s a sub-1mm gap between each lever and the lower (This is likely to accommodate airsoft lowers). For the price, it’s hard to complain. The shorter lever is nice since it prevents your trigger finger from rubbing against or interfering with it.