Specification Brand : Ejoyous BulletPoint1 : 7 PCS SET: A total of 7 drill bits with specifications of 1/4in 5/16in 3/8in 2/5in 1/2in 9/16in 5/8in for your use to meet different needs. BulletPoint2 : HSS MATERIAL: Made from high speed steel material, heat treated, these square drill bits have high hardness and long service life. BulletPoint3 : WIDELY USED: Square drill bits are very suitable for drilling square holes in wood with mortise machine or mortise accessories. BulletPoint4 : SHARPLY CHISEL: These drill bits are equipped with sharply square chisels to improve your work efficiency. BulletPoint5 : PRECISE SIZE: These square hole drill bits are fine made, with precise size, could perfectly match with the electric machine. IncludedComponents : No ItemName : Ejoyous Woodworking Square Drill Bits, 7 Pcs Square Hole Mortise Chisel Drill Bit Tools Woodworking HSS Mortising Chisel Drill Bit Set, Sizes 1/4 5/16 3/8 2/5 1/2 9/16 5/8 ItemPackageDimensions_Height : 3 centimeters ItemPackageDimensions_Length : 22 centimeters ItemPackageDimensions_Width : 17 centimeters ItemTypeKeyword : wood-chisels Manufacturer : Ejoyous ModelName : Aramox4py8cf7mqv ModelNumber : Ejoyouseiq4vcnyup PartNumber : Ejoyouseiq4vcnyup PowerSourceType : ac/dc ProductDescription : 1. 7 PCS SET: A total of 7 drill bits with specifications of 1/4in 5/16in 3/8in 2/5in 1/2in 9/16in 5/8in for your use to meet different needs. 2. HSS MATERIAL: Made from high speed steel material, heat treated, these square drill bits have high hardness and long service life. 3. WIDELY USED: Square drill bits are very suitable for drilling square holes in wood with mortise machine or mortise accessories. 4. SHARPLY CHISEL: These drill bits are equipped with sharply square chisels to improve your work efficiency. 5. PRECISE SIZE: These square hole drill bits are fine made, with precise size, could perfectly match with the electric machine.