The interchangeable Steel sheet folds around the end of the block, the punched holes enable a quick release and secure fit. SHEET Size 170 x 70mm. Block size when the sheet is fitted 120 x 70mm.
A very popular roughing out block, popular with Stone Masons.
FINE approx. equivalent UK 420 grit sandpaper
COARSE approx. equivalent UK 180 grit sandpaper
EXTRA, EXTRA COARSE approx equivalent UK 80 / US 24