It's one of the most useless tools I have. It sucks at everything besides that it actually holds the board. The only way it's useable is if you insert TH components and bend the leads so they don't fall out before putting it in holder. Inserting while in holder is a no-go. Not to say soldering under angle means that solder tends to flow downwards, especially on large solder joints. Frankly board just laying on the desk works better.