He's talking about knee wraps. Are you asking about straps for holding onto a deadlift? Your grip should grow with your deadlift, especially strong hands to begin with. I've never missed a heavy deadlift because of grip or failed on high volume work because of grip. I was very anti straps for years, but I got straps now for two reasons. The first is to save my hands, doing a lot of sets and reps at 600+ with a deadlift bar can really tear your hands up to the point where it hurts training. The second is for certain movements I want the equal lat activation without worrying about double overhand or hook grip failure being an issue. Like Romanian deadlift for example. Or today I used them on my regular light sets because I'm worried about slightly rotating and aggravating my last injury.