Clamp the nail in the right hole place holder next to the wall and hit the nail into the wall there are 11 different hole sizes for all common nail diameters material plastic size 245 x 55 x 40 mm nails also belong to the set weighing 16 kg contents 400 g 20 x 40 mm 400 g 25 x 55 mm 400 g 28 x 65 mm 400 g 31 x 80 mm comes in a see through plastic bucket