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What are centre squares made of?

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Most centre squares are made from ground tool steel. Most centre squares are made from ground tool steel.
Ground tool steel is an extremely durable and long-lasting material. Centre squares are likely to last a lifetime. Ground tool steel is an extremely durable and long-lasting material. Centre squares are likely to last a lifetime if used correctly.
The blade of a centre square is hardened and tempered. This makes it resistant to abrasion. The sharpness of the blade helps the user to quickly locate the centre of a part. The blade of a centre square is hardened and tempered. This makes it resistant to abrasion. The sharpness of the blade helps the user to quickly locate the centre of a part.
Wonkee Donkee says: 'Hardening the steel improves its mechanical properties, increasing its hardness and strength. Tempering further develops these properties and works to relieve the brittleness of hardened steel.'

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