Products like this are made in varied shapes, height, sizes and styles. But whether it is the latest model or not, you must always consider the relevance of every factor the ladders posses. If it is made of gold and you will use it to paint you old cabin, do you think that a gold one is relevant for such work, no it is not.
But practically, most of them are made in aluminum and wood, both of the materials have advantages and disadvantages. For works which are associated with electrical conductivity, wooden types are okay for this because it does not conduct electricity. This is why most electricians are using this type of extension.
This is also ideal for those who are very particular with marks and scratches, because this, does not create. Though the friction of the wood is stronger than any metal, its surface is as soft almost as the styro. The good thing also with this is it is five times cheaper than the other types. But this will make you carry a big weight.
When it comes to weight, aluminum is very weak for it because it is very light and can do heavier duty compared to the wooden. But since it has a bit of smooth friction, its rubber protector easily slips or gets damage because of its sharp sidings. This is not ideal for well polished floors and for a time usage unlike the first version.
There are three types of it depending on the duty, the household or light which can carry two hundred pounds, the one that could get a two hundred twenty five called commercial or medium, the industrial or heavy for two hundred fifty and the extra heavy duty for weight that will reach from three hundred to three hundred seventy five.
The height must also be observed, you should not but something that is to shorter will exceed to your need. Even if the longer version is cheaper than the shorter one, you have to mind that the short version is much useful for you. In height also always remember the the normal height and extended height is different.
There are some feature which are very useful for everyone, if you think that you badly need such feature, then you can have it as long as the quality is there. But, if you think that you could still find an alternative for such feature, and you find it wasteful for spending, then you can have another one without features. It is for you to judge.
In buying industrial extension ladders you must know the height of your house. You should buy something that is not too short or too long. Enough is the best for you to feel the comfort.
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