Innovative cutter head supporting three different knives making six radius roundover profiles. The standard cutter head is delivered with knives with a radius of 3/16 and 25/64 inches; two more knife sets are available to make radius 5/32-5/16 and 1/8-15/64. Perfect in all materials, but ideal on solid woods and panel materials. Tool features heavy duty aircraft aluminum body, 2 solid carbide knives, manual feed and pins for the automatic positioning of the knives. See Shaper Accessories for bore reducers. Extra Knives sets are sold only in pairs. Legend below explains sizing. Select your item(s) then click Add to Cart.