Halls XD720 High-Speed Steel Deburring Cutter 7 - 20mm HLLXD720 The Halls High-Speed Steel Deburring Smooth Cutter, ideal for deburring and chamfering pre-drilled holes in a wide range of materials. Optimum performance is obtained on aluminium and other soft alloys. Shank: 1/4in Hexagon. GBP 45.99 1