Malayas 5PCS Large High Speed Steel Cobalt Multiple Hole 50 Sizes Step Drill Bit Set for Cutting Holes in Steel, Aluminum, Copper, Stainless Steel, Brass, Plexiglass, Wood and Laminates

• Long Life True M2 high speed steel
• Automatically deburrs holes as you drill
• Large bit has 3-sided shank and small bits have hex shank to prevent slip in drill chuck
• 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 drill's chuck. Cobalt coated for smoother cooler cutting.
• Perfect for drilling holes in thin mild steel, aluminum, copper, brass, plexiglass, wood and laminates

Features: 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 drill's 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 M2 high speed steel Includes protective padded aluminum case Package Size:15cm*10.5cm*4.2cm(L*W*H) Weight: 450g Sizes: #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" 12 Steps (1/4'', 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8") Package including: 1 x 1/4-1-3/8 Step Drill 1 x 3/16-7/8 Step Drill 1 x 1/4-3/4 Step Drill 1 x 1/8-1/2 Step Drill 1 x 3/16-1/2 Step Drill 1 x Aluminum Box Caution: When you use this drill bits, the material (eg. steel, brass, wood, plastic, etc) temperature will get very high, please add some water or coolant to avoid the material get smoke when using it.