High quality, easy to read graduations make these chalkboard accessories ideal for any classroom. Use on chalkboards or whiteboards. Rubber pads prevent scratches and provide greater grip. Set includes: Chalkboard Protractor, 45 degree Triangle marked with both cm and inches, 60 degree Triangle marked with both cm and inches, Compass supplied with rubber suction cup, separate metal point and whiteboard marker holder, 100 cm ruler printed with both cm and inches and T-sqaure marked with both cm and inches.