2cm thread - for use as knobs for all furniture doors with M4 threaded sleeve connector required for all doors (not included):
10-14mm thread for cabinets, wardrobe and cupboard doors, 27-36mm for internal doors. Buy here: https://www.ebay.co.uk/itm/283795350544?hash=item4213856410:g:v1EAAOSwZwleVSl0