基本信息
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商品介绍
This is an internal expansion 壁虎 (also known as an internal explosion expansion tube or internal expansion sleeve), which is a core component of expansion fasteners. It is often used in conjunction with a screw to form an internal expansion screw. It needs to be used with a screw/bolt. After inserting the internal expansion 壁虎 into the drilled hole of the base material, tightening the screw will cause its interior to expand, tightly engaging with the hole wall to form a fixation