5X HSS Cobalt Multiple Hole Cut 50 Sizes Step Drill Bit Set Kit w/ Aluminum Case

5X High Strength Steel Cobalt 50 Sizes Step Drill Bit Set w/ Aluminum Case This unique drill set will replace 50 individual drill bits. Two-flute design gives you faster, smoother cutting 3-sided (TRI-FLAT) shank will not slip in your drill's chuck Self staring - 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 slipping in drill chuck Automatically deburrs holes as you drill Long Life high speed steel Specifications Dimensions Case: 15 x 10.3 x 4cm/5.85 x 4 x 1.56''(Approx) Weight 15.5 oz Bits #1: 3/16" to 1/2" 6 Steps (3/16'', 1/4'', 5/16", 3/8'', 7/16'', 1/2'')#2: 1/8" to 1/2" 13 Steps (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'' 9 Steps (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"' 10 Steps (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" 1