
Update: #1 size tip broke after 9 days of use. I put quite a bit of torque on the bolt I was tightening, so yes. I'll take it to my local dairy shop and see if they replace it. I'm an electrician and a couple of co-workers had these, but as separate screwdrivers. I use a ratchet screwdriver so this was the perfect solution. C1 is very suitable for plugs and sockets of different brands and ages. The C2 fits into a couple of ports I've had and it fits well too. From now on I will use them instead of square tips. Time determines build quality.