Developed in conjunction with the RNIB (Royal National Institute of Blind People), the Oxford Vision maths set has been specially designed to meet the needs of those with a vision impairment and/or learning difficulties such as Dyslexia or ADHD. The set includes: Self-centring metal compass with safety point; 9cm graphite pencil for use in compass; PVC and phthalate free eraser; pencil sharpener with anti-tamper screw; 15cm/6 inch ruler, 45 and 60 degree set squares; 180 degree protractor; and 10mm lettering stencil. Featuring large print graduations on the ruler, set squares and protractor which are raised 0.5mm to match braille specifications.