Fit For Northtech Surface Planers And Jointers With Helical Cutter Heads, including: NT-1696HC Jointer NT-1284HC Jointer NT-1000HC Double Surface Planer NT 1000HCHD-XL Double Surface Planer NT 400XL Heavy Duty Chain Drive Series Double Surfacer NT 610SC Double Surface Planer NT 610SS Supermax Double Surface Planer NT-610XL Heavy Duty Chain Drive Series Double Surfacer NT 760XL Double Surface Planer NT 820HC Double Surface Planer