Home » Our Branches » Tonkin Steel Mount Isa Tonkin Steel Mount Isa 45 Commercial Rd, Ryan QLD 4825 Mon-Fri 7.30am – 4.00pmSat 8.00am - 12.00pmChristmas trading hours - this branch will close from 21/12/2023 - 08/01/2024 mtisa@tonkinsteel.com.au (07) 4743 4089 Get a Quote today!