Trend QUADX1/2TC Quad groover setQuad Groover SetThis versatile 1/2 inch shank groover set offers grooving widths of 3.2mm, 4.0mm, 4.8mm and 6.3mm. It is infiniteley variable from 6.6mm to 18mm in 0.1mm increments. A jointing facility using the bearing is also possible. Set comprises of four 2 wing groovers with 7.94mm (5/16 inch) bore and an arbor which may be used singly or together to produce a wide range of groove widths. One ball bearing comes as standard.This set can also be used to tongue and groove 9mm to 22mm board.Specification-D=47.6 mmC2=3.2 to 18 mmB=22 mmE=12.8 mmShank Diameter=1/2 inchGroovers C:SP-QUAD/18 =3.2 mmSP-QUAD/532 =4 mmSP-QUAD/316 =4.8 mmSP-QUAD/14 =6.3 mm