Meaning of 参考に in this sentence


[![enter image description
here](https://i.stack.imgur.com/EjFoI.png)](https://i.stack.imgur.com/EjFoI.png)

> 普通のカマは細部を見るときの参考にしています

How I can guess it's meaning:

> When you look at the details of ordinary sickle, use it as a reference

But I'm not sure due 参考する in this sentence. How it will be more correctly?




It seems it is talking of some wooden sickle to be used in some matsuri like
地鎮祭{じちんさい}.

I am not 100% sure (there is not even much context) but I think the sentence
you are discussing can be translated simply as: _a standard/regular (that is,
a real) sickle is used as reference when looking at the details._

I guess the point is that the wooden one is made precisely to look like a real
one except that it is entirely made in wood and hence safe (which it is also
explained in the sentence above: [...]すべて木でできているのでさわっても安心です.

