Specifications: This set replaces 50 individual drill bits. Two-flute design gives you faster, smoother cutting. 3-sided (TRI-FLAT) shank will not slip in your drills chuck. Cobalt coated for smoother cooler cutting. Self starting - no need for a pilot hole. Cobalt coated to reduce friction and run cooler. Large bit has 3-sided shank and small bits have hex shank to prevent slip in drill chuck. Automatically deburrs holes as you drill. Long life true high speed steel 4241. Includes protective padded aluminum case. Type: Drill Bit Set Quantity: 5 Pcs in 1Set Case Material: Aluminum Drill Bit Material: High Speed Steel 4241 Sizes: #1: 3/16" to 1/2" (3/16", 1/4", 5/16", 3/8", 7/16", 1/2") #2: 1/8" to 1/2" (1/8", 5/32", 3/16, 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2") #3: 1/4" to 3/4" (1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4") #4: 1/4" to 1-3/8" (1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8") #5: 3/16" to 7/8" (3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8") Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x 5 Pcs Drill Bit Set 1 x Aluminum Case