Topic It does not give damage to the hand finger, is easy to grasp, economic metal tawashi offers.SolutionsInserting the cut in semi- elliptic of thickness several centimeters or the rectangular median of plane surface side of the sponge of semicircle forma, it interposes metal tawashi itself in the cut. Or, semi- elliptic of thickness several centimeters or the sponge of semicircle forma 2 are cladded, metal tawashi itself is interposed in the interposition part. Metal tawashi itself, hoists the coil for helical metal tawashi to doughnut condition and forms and it is the structure which provides the space in the center, sponge and metal tawashi itself moors with the stop. Choice figure Drawing 3
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