Description: 13Pcs Twist Drill Set Individual Drill Bits 1/16"-1/4" Round Shank Drill Set Titanium Coating HSS Drill Bit Set Quick Change Drill Bit Set. Specification: Product name: 13Pcs 1/16"-1/4" Round Shank Twist Drill Set; Material:4241 HSS, Titanium Coating; Size:1/16",5/64",3/32",7/64",1/8",9/64",5/32",11/64",3/16",13/64",7/32",15/64",1/4"; Shank size:Round shanks; Application:It can be used in brick wood, plastic, aluminum, thin iron; Quantity:13pcs Twist Drill Bit; Features: - [ Round handle design. ] Suitable for electric drill and electric screwdriver, enabling you to quickly change drill bits. - [ Titanium plating on twist drill. ] Twist drill 4241 HSS forging, surface is titanium coating. - [ Widely use. ] It can be used in brick wood, plastic, aluminum, thin iron, can not be used for brick walls and other metals. - [ Durability. ] This set of durable 13 piece titanium nitride coated drill bits lasts six times longer than standard drill bits. Package included: 13Pcs x Twist Drill Bit