For routing draining grooves in solid timber for belfast type sinks made from 12mm hardwearing cnc machined phenolic provides a 05 degree fall grooves at 50mm pitch and 455mm long sight marks for lining up three removable sloping runners for support cutter diameter check hole fixing holes for user made stops for repetition work whats included1 x cove cutter1 x guide bush diameter 30mm specifications fall05 degree groove pitch500 mm groove length455 mm slat width198 mm length625 mm height585 mm w