Tombow MONO Zero Pen-Style Holder Eraser, Rectangular Tip (2.5 x 5mm), Black Body with 1 Refill Pack (2pcs), Model EH-KUS

This is a precision, ultra-fine holder eraser that allows for pinpoint erasing with light pressure. It features a 2.5 x 5mm rectangular tip and a short-pitch knock mechanism that extends the eraser by only 0.7mm per click. The long metal guide pipe provides a clear view of the erasing surface, reducing obstruction from the pen barrel.