5/32″ x 4-1/2″ x 5-1/2″ Rock River® 2-Cutter Carbide Hammer BitFastenal Part No. (SKU)0259456UNSPSC27111543ManufacturerFastenal Approved VendorBrandRock River®Product Attributes TypeHammerdrill BitDrill Size5/32″Drilling Depth4-1/2″Overall Length5-1/2″Number of Cutter Heads2Shank TypeRoundFinishShot-BlastMaterialSteelTip MaterialCarbideFlute Length4-1/2″Number of Flutes1Shank Diameter0.160″Product Weight.24UOMeachNotesMachined with a mill rather than ground. An insert of tungsten carbide is brazed into the steel to provide the cutting edges.Tungsten carbide tip with aggressive cutting angles for increase drilling speedOptimized flute geometry for fast dust removal.Masonry bits typically are used with a hammer drill. The bit is both rotated and hammered into the workpiece; the hammering breaks up the masonry at the drill bit tip, and the rotating flutes of the drill bit body carry away the dust. Rotating the bit brings the cutting edges onto a fresh portion of the hole bottom with every hammer blow. Hammer drill bits often use special shank shapes such as the common SDS type.