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Consists of a steel collet multi-stepped mandrel & a tapered pin expander Easily stretch and enlarge rings & bands The mandrel can be removed by simply tapping the opposite end Colour: Black material: metal Package Contents: 1 * ring expanderOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.