Definetly progress into it. If you've never lifted with a bent back and try to max out this lift, the risk of injury is too high. Start with just the bar and add 5 kg each week until it gets heavy. Keep a few reps in the tank in the first weeks. This way you can develop a feel for this movement and grow the supporting musculature. If it feels to light you can progress a bit faster, but please stay on the safe side.

This is called the jefferson curl. You can either do it with a zercher hold (bar in the crook of the arm) like I'm doing here. Or you can grab with your hands, but then you need a box or something else to stand on.

Thanks a lot. Pleased to meet you too.

Hello good day?

Thank you. Yes, it's supposed to be a SLD, I'm trying to focus on my hamstrings. Your bench is very impressive too. A lot heavier than I can bench.