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Chen Yun Han / hammer

Chen Yun Han
Chen Yun Han

Classified by the weight of hammer heads, there are more
than 7 kinds of standards of hammer now days
With the design of hollow hammer head , tunable hammer
allows weights to screw in head and make it possible to be
any standards of hammer
Because of the weight-switching ,tunable hammer would be
use by elder, teenager even children


ISU University

ISU University
Kaohsiung, Taiwan