It's made of high quality iron, which is not easy to bend. 

With good manufacturing, fine workmanship and in reliable quality, it is durable and strong. 

Wide Applications: Adjustable Screw and two sizes of pin on either side make this spanner wrench suitable for different distances between slots and different sizes of slots. 

Dimension: Length: 11.8in (30cm).

Arms Opening Width: 0.6in-4.7in (1.5cm-12cm);