Door Bits › Door Bits - Carbide Insert Drill Bit Accessories - Insert for Spur (Box of 10) Door Bits - Carbide Insert Drill Bit Accessories - Insert for Spur (Box of 10) Sale Price: $29.27 Original Price: $33.52 This Southeast Tool Carbide Insert Drill Bit Accessories comes:14x14x20mm Reversible Insert (Box of 10)Used for: Spur Quantity: Add To Cart Added! This Southeast Tool Carbide Insert Drill Bit Accessories comes:14x14x20mm Reversible Insert (Box of 10)Used for: Spur