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About Product:Knife Rod used Taiwan senior alloy steel manufacturing, through overall special heat treatment and the surface fine bright chrome plating processing, let its durable 1: high accuracy of laser print scales can measurement hole deep, exposed height,, according to different of batch Rod length, measurement length most long can up 130MM2: top drops glue has different of specifications mark, and by color for distinguish, can a eye defines, fast recognition 3: straight side, and long slot of batch Tsui applies Yu electrician aspects of professional application