Slendy Plus Thin Steel Knock Eraser and Refills285015 $2.00
This is a fantastic little addition to your office supplies toolkit. Super slim, super strong metal holder holds an effective little eraser for tackling errors with extreme precision. A button on the side of the holder -- that's the knock part -- extends the eraser slightly or completely for easy replacement. A strong clip allows you to keep the Slendy+ at hand by clipping to pocket or inside notebook. One eraser is included with holder. Eraser refills are available in sets of two.
Holder with one eraser .4 x 4"
Refills (set of two) .33 x 2.75"