Because there is no explanation of the back ledge, if you use it in a flat place it will be diagonal and it will be skewed, right handed, if you cut it straight it is difficult to cut with diagonal, perhaps because it is fixed for something Usability is not good in a place, it cuts to near the end, it gets scratched a little, it seems that it is not a product that can be used for a long time, I think that it is very good for do-it-yourself carpenter.
I used to cut at right angles with a gauge so far and saw it with a saw or round saw, but I used it for cut at right angle, 45 degrees angle with handwriting saw, but I was able to work more accurately than I thought. Depending on how to enter sawtooth it may hurt the main body, but at this price it is satisfactory to purchase it as it will help cutting with high precision as expendable items.
Although we use it considerably carefully, it is unavoidable to shave the body by all means, so a division as a consumable is necessary. I think that it is natural rather than hurting a saw, but it is good. I will purchase again when the precision is no longer good.