[50 Size In 5 PCS ]
The step drill bit set includes five standard HSS step drill bits that can replace 50 individual drill bits. A drill bit can be used as a substitute for multiple drill bits to meet different needs. With the five pieces step drill bits that we offered, you can process 50 different kinds of diameter holes, which greatly saves you a lot of trouble and space. That means, 50 sizes are condensed into five, making the drilling become more simple and practical.
[HSS and Titanium Coating]
Made of strong and durable high speed steel coated with titanium , high speed steel make it last longer than others, titanium coating ensure easily cut thin through steel sheets, aluminum sheets, copper & plastic & wood board and many other types of sheet metal with ease, and it can automatically deburr holes while drilling to keep the drill bit clean.
[Double Cutting Blades and Three-Sided Shank]
Double cutting blades and X-type openings design ensures a faster and smoother cutting; and 3-sided shank design prevents slip in drill chuck; Provided with small pressure and the sets can cut through the wood, sheet metal, steel and other surfaces
[135 Degree Spilt Point Tip and Two-Flute Design]
The split point tip is at 135 degrees to increase the cutting speed with self-centering and prevent walking, which allows you to cut faster. The two flute design also provides a faster and smoother cutting. And it clears chips faster, allows the material particles escape easily for a much more clean drilling operation. Just provided with small pressure, the step drill bit set can easily cut through most types of sheet mental.
[Hard Automatic Center Punch] The thimble head is made of carbide tipped bit and its impact resistance is 10 times that of ordinary center punches;before drilling, automatic center punch can mark the positioning hole to prevent the drill and the screw from sliding
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 includes:
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
Drill Shank Diameter
1 / 4-1-3 / 8
9mm
3 / 16-7 / 8
9mm
1 / 4-3 / 4
9mm
1 / 8-1 / 2
6mm
3 / 16-1 / 2
6mm
I’ve tested these out on several different materials like sheet-metal and plastics and they do a very good job, they bore the holes with ease although I suggest a starting hole with a regular drill bit if you’re looking at accurate placement of where you want the hole to be.
this is so much better than using a drill bit especially in thin material or plastics, not like using a bit that the hole is just a tab to small and then the bit bits into the thin material that you are drill, with these drill try the fit if not fit drill a little deeper, love them you will too.
This set of step drills is an absolutely excellent product. I have been using these step drills to enlarge half inch holes in quarter inch steel. They work great and after twenty five holes they still look and work like new. This is an excellent product and a super value for the price. Kris
If you don't have a set of these, you should! Ever tried to drill a hole in any thin metal or aluminum? If you go slow you can also do plexiglass or plastics. These are a great way to get the hoes you need without the "drill grab and twist" . I will sometimes use a tape flag or sharpie mark to control the depth so I don't overshoot my hole or multiple holes.
I can’t be certain of longevity or durability yet but for the price how could one be negative? They are perfect for the occasional need and will complete the project. They are stored in a nice little case which makes it handy for organizing. In any case you’ll have one on hand when needed without breaking the bank.
I bought this set over a year ago, and every time I use it make me very glad I purchased it. Great value compare with box store prices. Will probably buy again for my second property. Thanks a lot to the manufactur.
while I am certain this is not stout enough to be the "Drill all the things" bit; its a step drill and should not be. Its good enough for what it is, i just drilled through and old truck and its just fine.
This set has all the sizes you would need for most every project. Good for 1/4 inch steel. I will be using using this set for years to come. Cuts fast and clean. I use them with my drill press to make the holes.
You pay alot of money for a high quality set of step bits and i didn't want to spend that much so i chose these ones. They didn't disappoint , I used them on a number of construction projects and they actually exceeded my expectations.
Installing a receiver hitch on a truck and had to drill 8 holes through the frame. Was really impressed with how quickly it bored through the metal and didnt dull after the 1st hole. Kept its edge and actually impressed me
Difficult to locate a tool that will enlarge a existing hole especially in metal These drill bits are very creatively designed for use in thin material e.g. metal High quality product and impressive packaging.
Good set and working nicely.I use mostly on aluminum .Leave a nice clean hole and automatically ease the edge of the hole.With steel use cutting oil and don't spin too fast so you don't burn them.These work great to enlarge a hole as they don't grab like a regular drill bit. Drill a small hole first with a normal bit than enlarge with these. Works great.
I have used it several times and it functions well. It is just what you need to drill holes of various sizes. It does not drill holes very deep so keep that in mind. Also buy the cutting oil to go along with it when drilling steel.
Great set of bits, had a chance to use everyone. Now I used them all on my boat, so I was going through fiberglass n that can be some terrible stuff to go through. Had areas of 1" to 3/8" but all cut perfectly. The case is a plus...
I haven't even put this tool set to the test since purchasing. The case is a thin aluminum, with closing clasp. A padded shell on the inside to protect unibits from bouncing around. My order was ok, the case appeared to be damaged with scrapes and scratches on the exterior, even a small dent on the top. This did NOT play any effect the actual pieces(uni-bits) inside the carrying container.
The first set of these bits have lasted me over 4 years. I needed some at home so i brought the set i had been using at work home and replaced my work set. The 4 year old bits are still doing a decent job.
Have only used on the plastic body panels of my ATV and these are exactly the right tool. Makes a perfect hole for installing a nice grommet to run cables through. I intend to use these only for thin materials like plastic or sheet metal, but so far, they're the right prescription!
I had a different brand when I drilled a large hole it ripped through. This one cut it like it's supposed to. The large one (1 3/8 in.) is the only one I've used so far . But it cut so well I'm sure the other ones will to. Thanks for a great product.