This tools is called grates and stones. It had been used since Neolithic period. This main purpose was to mill/grate the nuts or grains to eat it. How to use it? First, you have to grab the grey long shape stone and rub on the bottom stone. It was mostly used on the Neolithic period, however its popular decreased during the Bronze Age. This fits into my theme because my theme was tool and this has its duty of milling/grating the grains or nuts. Therefore, it's a tool. I see different rocks which is stacked together, one rock on the top is grey color, the bottom rock is black color. I think this tool is similar with Korean traditional tool which used long ago, called 'metdol.' Because its usage is same as this tool. I wonder if this can used in weapon. This source is reliable because the author is the part of Korean Cultural Heritage, and this tool is part of that.
This tool is called joint fishing. This was created with bone, rock, and string. People in Neolithic used this tool when they went to the far distance ocean and caught variety of fishes such as tuna and so on. This fits on my theme because this was created by human and they used it for fishing. I see a sharp point on the left side of this tool. I also can see pretty long string which is connected to it. I think people also used nets to catch more fishes than by using this tool. I wonder if they used spear also for catching fish. This is reliable because this source has other catogories which is connected to pre-civilization.
This tool is called cog wheel. This tool proves that during the Neolithic period, they often made a clothing to wear. This tool has a hole on the middle, and you put a stick through it, and you make the clothing. Basically this tool is to make clothing to wear. I see a cog wheel which looks like a donut, labeled structure, and a stick going through the cog wheel. This is my part of my theme, because this is a tool of making cloth, therefore this fits in to my theme. I think people were pretty smart by inventing this tool for making clothes. Also, I think women stayed in house and made clothes by using this, and men went hunting for food. I wonder if there is a another tool of making clothes. This source is reliable because it has specific usage and detailed description of the tool in Korean, so I consider as a realiable source.
Spearheads were often created in two-piece moulds that was found in Ireland and Highlands. During the Early Bronze Age, smooth stone moulds were used to create spearheads, however in the late Bronze Age, the clay became more common. After creating a spearhead have finished, then our ancestors hammered and occasionally decorated it. Also some evidences ancestors used this tool for fighting and hunting. This is part of my theme because definition of tool is device which is handhold and useful, and spearheads can fit into it. I see sharp point on the left, and it's length is about 10cm. I think this was used effectively in hunting so this can penetrate the wild animals accurately. I wonder if this usage was used differently, not in hunting or war. I can rely on this source because this source is .org and related with the british museum so they could know variety of tools in that period.