Uxcell a14050900ux0730 1/2" Shank 1 1/2" Radius Two Flutes Metal Roundover Router Bit Bearing Product Name : Corner Rounding Bit ; Standard : 1/2" x 3" ; Shank Diameter : 12.7mm / 1/2" Bearing Diameter : 12.7mm ; Radius : 38.1mm / 1 1/2" ; Cutting Thickness : 45mm / 1 3/4" Cutting Diameter : 89.2mm / 3 1/2" ; Cutting Depth : 38.1mm / 1 1/2" ; Total Length : 90mm / 3.5"