spots are hit much harder sawing much deeper into the surface causing a much different effect than planks that are flat this greatly increases the variety of saw textures and makes a very realistic final product the planks also have random lengths which further guarantees that no two planks will come out exactly alike the random length planks are fed into a roller distresser depicted in fig5 and 6 the order of the boards is preferably mixed up compared to the order they came out of the saw distresser this also enhances the randomness because the finished product is not sequential planks in the order they came out of the saw distresser the roller distresser machine was custom designed and built to achieve a realistic simulation of indentations found in 100 to 200 year old plank flooring broadly the machine puts random indentations in the surface of plank flooring much like the dents found in old plank flooring from years of boot traffic high heel dents stones etc the randomness of size shape intensity and concentration is critical to achieving a realistic distressed plank floor the frame 100 of the roller distresser uses 4 u2033 square tube approximately 5 u2032 wide by 6 u2032 long by 7 u2032 high the distressing roller 102 is 30 u2033 dia u00d7 36 u2033 wide u00d7 u215c u2033 thick mounted on a 3.