[WORKING SIZE]: 1/4" to 7/8"(6-22mm).

[MATERIAL]: Nickel plated/ zinc alloy body.

[APPLICABLE COPPER TUBE SIZE]: This tool can be used to expand copper pipe with a diameter: for metric tube：6/8/10/12/16/19/22mm (For inch tube: 1/4" 5/16" 3/8" 1/2" 5/8" 3/4" 7/8").

[AUTOMATIC RESET SPRING]: Only need to gently press the handle to use it, let go will automatically reset the handle.

[APPLICATION]: Refrigeration copper pipe, tube, cannot be used for expanding stainless steel tube.