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Aluminium alloy: all aluminium alloy conical straight bottom end general plug, made of aluminium alloy new material, play light effect, quick release, split structure, protect the bottom end compatible with 30 mm straight bottom end and 3.8 cm conical bottom end No damage: arc chamfering, adjust the lower gear, turn the chamfering of the lower gear angle, install and drive without damaging the lower gear Easy installation: easy to use and assemble, easy to drive in straight tubes / conical ground Package: Ou rpackage comes with a 45# steel sleeve, a 30 mm straight pipe plug in and a 3.8 cm spinal canal plug in International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. › See more product details; Product description International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.; Product description International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.; International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.