This 19mm (3/4 inch) grinding head has a straight middle piece and a taper of 9° and 18° so you can mitre the edge of your glass pieces. This allows tight positioning of pieces, producing narrower, cleaner, solder seams, ideal when making lamps and other three-dimensional objects. For lamps/objects with 10 or more panels choose the 9 ° angle, use the 18° angle for less 10 ten panels.
Fits most makes of grinder with standard spindle fitting, Glastar, Inland Kristall etc. tightens with a grub screw.