After bouts of the same flaws and breakdowns he displayed through his first two seasons, Ereck Flowers had his first technically sound practice of training camp Saturday. The Giants, having put their faith in the beleaguered left tackle, need to see a lot more of that this season.

Coming into camp, Big Blue’s biggest question mark — and the biggest key to unseating Dallas in the NFC East — is whether they can get improved play from Flowers and right tackle Bobby Hart. So far, Hart has taken a step forward, and the Giants are desperately hoping Flowers can do the same.

“Bobby and Ereck, they’re not twins, are they? Every time we talk about one, it seems we talk about the other. They’re two different people,’’ coach Ben McAdoo said. “Bobby had a nice day. He’s bending well. He’s making progress in his technique and he had a couple runs where he stretched the front side well, which was good to see.

“Ereck’s getting better with his punch in pass protection. He’s working on keeping his hips down and he’s making progress. … Development takes time, and right now … for Ereck, third down is a big period for him. That’s where he needs a lot of work, in pass protection and one-on-one versus defensive ends. And he took a step [Saturday] to get better in our third-down period and he did a nice job.”

Asked if this would be a big year for him, Flowers replied, “Why wouldn’t it?”

But with just one more year after this one on his contract, time could be running out for him to prove himself worthy of a first-round draft pick and solidify his spot on the Giants’ line long-term. His 50.2 grade on Pro Football Focus was 62nd among tackles, far worse than below average and squarely in the poor range.

Flowers spent the majority of this offseason in East Rutherford, with Giants coaches saying he was at the team facility practically every day. The improvement in his conditioning has been noteworthy.

“[It’s] going good. Yeah, I feel it. Every day it gets better out there,” Flowers said. “I’m not as tired as I was before, and you get better every year. … I think it went pretty good. I don’t think [fatigue] necessarily was an issue, but I do think that being in the best shape always helps.”

Exactly what kind of shape, Flowers won’t say. He was listed as 325 pounds last season, but it’s unclear exactly what he weighed and he refused to say what he’s tipping the scales at now.

“That’s not to be talked about. … I just don’t feel the need to talk about it,” said Flowers, who insisted he’s at his ideal weight — whatever that is. “Yeah, I am. It’s camp, so you lose a little bit, but I am right where I want to be.”

Historically, Flowers has struggled against faster speed-rushers. Despite better conditioning, he exhibited the same lapses in technique early in camp. That’s what made Saturday’s clean practice stand out.

“I’ve been trying to work on hand placement, pass protection,’’ Flowers said. “[Hand speed is] important, too. They’re all important, trying to get them to work together. This is the first time we are wearing pads in months, so every day it’s getting better and feeling more comfortable.

“I see myself improving every day out here at camp. First I started off a little bit, and now I see me getting a lot better every day.”

Hart also spent his offseason working out in New Jersey with Flowers.

“I feel better I feel stronger. Just me personally trying to be focused,’’ Hart said. “This is where I’m going to be, this is where my main focus is so why go anywhere else. I’m going to stay here with [strength and conditioning] coach [Aaron] Wellman and Markus [Paul, assistant strength and conditioning coach].”