1、STRONG MATERIAL: Router bits are made of excellent carbon steel for a long life and very accurate first cut 2、WEAR RESISTANT AND DURABLE: Woodworking router bits have the advantages of high hardness, wear resistance and heat resistance 3、USAGE TIPS: The handle of the router bits must be fully inserted into the sheath and secured; otherwise, the handle may fall off easily 4、PROCESSING OBJECT: Router bits set is suitable for wood processing, not for non metal processing such as metal stone and wood materials 5、APPLICABLE SCENARIO: Router bits kit is suitable for trimming machine, electric router, engraving machine, and milling cutter 16 x Router Bits4 x Storage Box1 x User Manual Item Type: Router Bits SetMaterial: Carbon steelSpecification: Straight Bit 1/4( 6.35) Shank: 1/2( 12.7mm), 3/8( 9.52mm), 5/16( 7.96mm), 1/4( 6.35mm)Round Nose Bit 1/4( 6.35) Shank: 1/2( 12.7mm), 3/8( 9.52mm), 5/16( 7.96mm), 1/4( 6.35mm)Flush Trim Bit 1/4( 6.35) Shank: 1/2( 12.7mm), 3/8( 9.52mm), 5/16( 7.96mm), 1/4( 6.35mm)V Type Cutter Bit 1/4( 6.35) Shank: 1/2( 12.7mm), 3/8( 9.52mm), 5/16( 7.96mm), 1/4( 6.35mm)