ITEM NAME:2pcs 1/4" Shank Top Bearing Flush Trim Description: This template hinge mortise bit has a 19mm cutting diameter with a 8mm cutting depth. This bit's shallow cutting depth and center meeting blades make it perfect for routing door hinge mortises using a hinge template. With 1/4" Shank (6.35mm) Cutting Diameter: 3/4"; Cutting Length: 5/16" Overall Length: 1-15/16"; Number of Flutes: 2; Bit Construction: Car.With 1/4" Shank (6.35mm). SKU: DMO0014204219397788.