The Speed Bleeder has thread compound on the threads so unlikely to get air back in. Plus you can get SS ones. So just that alone is worth getting them.Im asking about the style you can do a complete fluid flush / swap all by yourself. I see there is the little one way valve style . Some say you can still pull back air when you take your foot off the brake petal through the threads on the bleed screw. . ?? Truth ?? Then several other styles. Dealer wants $270. Gen 3 Nissan Frontier. Want to do it right. But not sink the bank into it. What systems / cost efficient do yall recommend and use. Wardawg