1、4 PCS SET: This auger bit set includes 4 sizes, 25mm, 30mm, 32mm, and 35mm, providing you with a versatile solution for various drilling needs.  2、HIGH EFFICIENCY: Featuring 4 flutes 4 slots design, these wood auger bits enable efficient chip removal, reducing clogging, delivering faster and cleaner drilling.  3、MULTI MATERIAL APPLICATION: The auger drill bits are suitable for drilling various materials, including elm, particleboard, rosewood, MDF, PVC board, and more, ideal for woodworking, construction, and DIY projects.  4、DETACHABLE DESIGN: The hex shank can be easily attached to electric hand drills, cordless drills, or bench drills, while the socket can be attached to electric wrenches, offering maximum convenience.  5、PREMIUM MATERIAL: These wood boring bits are made of 45 high carbon steel, which has been quenched under high temperature to ensure durability.