4 piece joint assembly setclean joins of silicone and acrylic with excellent results suitable for joining up widths of 3 4 5 6 8 10 14 and 20mm and grooves the desired joint width is stamped on the relative jointing fillers no troublesome adhesion with adhesive tape is necessary supplied with a see through boxspecial rabbeting knifesimple clean clearing out of old silicone and acrylic joints using the specially shaped blade easy grip round handle cuts in both directions