Eraser assembly and eraser inserts

An eraser insert, comprising:

• a first side comprising a mounting surface having a central portion and a peripheral portion and a second side;
• an eraser pad disposed on the second side;
• a pull access aperture at an end of the eraser insert extending through the eraser insert, the pull access aperture having a first edge, a second edge opposite the first edge and an opening disposed therebetween;
• a continuous rim disposed in the peripheral portion of the mounting surface, the continuous rim extending continuously from a first end at the first edge of the pull access aperture to a second end at the second edge of the access aperture;
• an annular region disposed within the central portion and spaced away from the continuous rim, the annular region projecting from the first side and in a direction away from the second side;
• and
• a magnetically attractable member retained by the annular region with a thickness of the magnetically attractable member extending in a direction between the first side and the second side and a width of the magnetically attractable member aligned with the mounting surface;
• the magnetically attractable member and the continuous rim configured to detachably connect the eraser insert to an eraser assembly at the mounting surface by magnetic attraction of the magnetically attractable member to a corresponding magnetically attractable member disposed in the eraser assembly and by positioning of the continuous rim within a corresponding recess of the eraser assembly.