18pcs Combination Drill Set (HSS Drill Bits, Brad Point Wood Drill, Masonry Drill. HSS Metal Drill :1/8",5/32",3/16",1/4",5/16",3/8" Wood Drill:1/8",5/32",3/16",1/4",5/16",3/8" Masonry Drill:1/8",5/32",3/16",1/4",5/16",3/8"