Helix Oxford Advance Maths Set - The advance improves on the traditional Oxford Maths Set by featuring a stylish silver embossed tin, a mechanical pencil and multi-instrument The Oxford range from Helix has a worldwide reputation for quality and excellence with an enviable brand that is known for using its traditional values of product development and applying them to modern day curriculum requirements. Known across the globe as the world's best maths set and brand leader in the UK, the Helix Oxford Maths Set has sold over 100 million units.