Freud PB-104 Precision Shear Serrated Edge Forstner Bit Set, 1/4 inch- 1 inch, 4-PieceNew Precision Shear Forstner Bits feature a double ground, razor sharp serrated edge that slices throughout the rotation of the bit for less splintering and chipping, producing flawless flat bottom holes. This unique geometric design has multiple cutting edges that produce greater shearing action, allowing for faster rotational speeds and more efficient cutting. Highlights: Material: Hardened Steel Point Type: Shear Diameter : 1 4 inch to 1 inch