Feature●Concave Shank Type Cutter - Form Relieved - High Speed Steel●Concave - Radius: 3/16 - Shank: 3/4 - Overall Length: 3 1/2 - Cutter Dia: 1 3/8 - Number of Teeth: 6●Cutters are made for various radii●Made in USADescription Can be resharpened without changing form.