GHP 8 Pcs. 24" Extra Long Wood Drills Auger Drill Bit Set with Wood Case Auger wood drill bits set in sizes from 1/4" to 25/32" Can be used with hand auger drills, or power drills Auger drill bits are an essential tool for carpenters, plumbers, electricians, etc. Auger drill bits are constructed of tempered and hardened alloy steel and feature self feed tip Auger bit sizes: 1/4", 5/16", 3/8", 15/32", 9/16", 5/8", 11/16", and 25/32" all 24" length