Whiper MR2 features advanced mini roller head which is more durable, and can easily apply overlapping layers of tape without scratching the area that has already been corrected. 2-way corrections, correct the exact spot you want to correct with a neat finish. Refill cartridge is compatible with two types of applicator - MR2 mini and MR2. Refill cartridges are easily removed and inserted, with less plastic disposal.