Feature

●?4 size can make the hole different size
●?The whole drill is heat treated,offering higher hardness.
●?Partial black oxide treatment prevent rusty and provide beautiful appearance.
●?High-speed steel tools are good for most general purpose applications
●?offering a combination of hardness and toughness for wear resistance
●?The length is longer than the normal one


Description

4Pc 1/2, 3/8, 5/16, 1/4-Inch Woodworking Square Hole Drill Bits Wood Saw Mortising Chisel Cutter Tool Set