For grinding surfaces in very tight spots eg corners sides and inaccessible areas the oscillating motion ensures quiet operation and also facilitates cutting insert and file the variable speed facility ensures the correct speed for every material special balanced low noise dc motor with high life expectancy main housing of glass fibre reinforced polyamide complete with 4 sanding discs 2x 80 grit 1x 150 grit and 1x 240 grit in an attractive case as described on the right