Good for both flat surfaces & contours.Kit includes: 150mm flat sanding block, 150mm flat block with angled sides, 150mm curved block, 230mm curved block, 125mm block, 390 sanding file + curve attachment, 35mm baby block & baby sanding triangle.140mm double density block, 70mm tiny tear sander, 140mm Curve-a-flex, 140mm tear drop sander, 122mm TrueFlat block & 225mm TrueFlat block.Together with a wrap block & a set of density pads in soft, medium and hard finishes.Supplied in storage case.