Four sizes: 6mm/20mm/25mm/30mm for different needs This premium woodworking auger bits equipped with pin eyes for easy mounting handle Great for the handle. Insert a small branch or wood onto the drill shank hole position where you want to make a hole Self-tapping pilot screw design for easy hand powered wood auger and labor saving A must-have tool for Hiking,Camping,Outdoor Backpacking survival,emergency This premium woodworking auger bit equipped with pin eyes for mounting handle easily Four sizes: 6mm/20mm/25mm/30mm for different needs Great for inserting a small branch or wood over the drill shank hole position where you want to make a hole Self-tapping pilot screw design for easy hand powered wood auger and labor saving A must-have tool for home Hiking, Camping, Hiking Outdoor Survival, emergency