SE

SE Watch Case Wrench, Adjustable

3.6 out of 5 stars 372 customer reviews

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  • Easy to use watch tool
  • Includes 4 sets of clamps
  • Quality construction
  • Wooden storage case included
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Currently unavailable.
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Product Description

This waterproof watch case back wrench opener tool is great for opening waterproof watch case backs for changing batteries or changing movements. The waterproof case back opener includes 4 sets of clamps, round, flat, square, and toothed. The is will work on most of the waterproof watches such as Seiko, Citizen, Fossil, Guess, Rolex, Tag Heuer and many more.

  • Product Dimensions: 7 x 3.2 x 1.5 inches
  • Shipping Weight: 8.8 ounces
  • ASIN: B000HFRO8O
  • California residents: Click here for Proposition 65 warning
  • Item model number: Necklaces
  • Date first available at Amazon.com: July 10, 2006
  • Amazon Best Sellers Rank:
    • Average Customer Review:
      3.6 out of 5 stars 372 customer reviews

    Product Specifications

    Watch Information
    Brand, Seller, or Collection Name SE
    Model number Necklaces
    Part Number 6419934
    Item weight 8 Ounces

    Customer Questions & Answers

    Customer Reviews

    Top Customer Reviews

    Verified Purchase
    I read many of the mixed reviews for this item and looked over the photo carefully in trying to figure out if this case opener would work with two of my watches with notched case backs (one is a Seiko and the other a cheaper REI, both with 2mm square notches). Even though the product description/features is very sparse, I decided to purchase it, thinking with 4 different bit sets, surely one would fit my watches. Ha -- not so!

    Since it's not mentioned in the description or anywhere else, let me tell you about the 4 "different" bit sets. I measured these with calipers I believe are reasonably accurate:
    -- one set of round bits 1.6mm in diameter in the box, plus a second set of the same already in the tool
    -- one set of round bits 2.4mm in diameter
    -- two sets of bits, that at first glance, both appear to be 5.6mm wide square bits; however, one is slightly concave and the other slightly convex. I guess this is where they get away with saying there are 4 different bits/clamps. I'm not sure what manufacturing tolerances for these are; hopefully they wouldn't be too different from set to set (like 1.3mm instead of 1.6mm). All I can say is that this was what was in my set, but it's still more informative than any product description so far.

    I put the jaws at their maximum and minimum, and by marking on paper & pen, then using some geometry and a ruler, figured that the widest watch case you could probably use this on is a 40mm diameter case back, and the smallest would have to be at least 20mm. This is consistent with a few other reviews that mention case back diameter. Like another reviewer mentioned, to get enough tension, the bits or pegs end up kind of angled.
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    2 Comments 65 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    This item was merely acceptable. Adequate, but I was expecting more for $20.

    By 'Jaxa type' I guess this means that it is based on a similar 'Jaxa' tool. It must be smaller than the genuine version, since I could not open three jaws wide enough to use this wrench to open any watch in my collection, using it as intended (ie, by engaging all three jaws with the watch's caseback). At it's maximum position, I could just barely fit two jaws on the caseback of two larger diving watches, which didn't allow for as much control as I'd have liked.

    Those with larger diving watches or tool watches in the ~40mm case diameter range might have a rough time, as they might not be able to engage three lugs at once, which limits the torque and stability.

    The initial quality of the tool is adequate, although the materials (specifically the bits and the internal screws, are covered in a lubricant to prevent them from corroding (which will likely begin promptly once it was wiped off to actually use the tool).

    The design also allows the bits to turn freely in the tool, which allows the non-symmetrical bits to spin freely, moving off their contact points, and they won't stay aligned and properly grip under load; but the round bits work well, and should work for any caseback design. Clearly, the flat sided bits can only be used in a model that locks them in place. And, each style of bit had one extra in the package to replace any that might be lost during the life of the tool, a very thoughtful feature.

    The shipping was acceptably quick, but the item arrived loose in the box with no packing material or padding, save for a single inflatable pillow the size of a small sandwish bag (completely useless to protect anything).
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    4 Comments 61 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    I dont know If I will ever know how good this tool is ,because it is to small and wont work on any of my watches. If you're going to purchase this item make sure it will fit your watch.
    Comment 12 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    Bought this set when the second watch of my wife stopped. So far, I have used this opener to chang battery for 4 times. This opener has worked just the way it is supposed to. Very happy about it.

    By the way, Amazon is the place I love to buy from.
    1 Comment 18 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    >This item paid for itself with the very first use and saved us the aggrevation of having the watch sent out to have the battery changed.
    >Easy to use and very cost effective.
    >Recommend this item for watch backs which the manufacture reports use without hesitation.
    Comment 11 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    This tool opened a screw-back MINI watch that a jeweler told me needed a special tool (don't you think they would have the special tool?). To use the tool, the bits need to be snapped into the receptacles, not just perched in the top. When snapped in the bits do not fall out when the tool is turned upside down. As for the comment of the handle being useless because it is also an adjustment, I found it was much better to hold the told by the head to use it anyway, to keep even pressure on the bits. I had no difficulty opening my watch and then reclosing it after changing the battery. This tool worked perfectly.
    Comment 10 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    This was very handy and is adjustable enough to fit all of the watches that I tried it on. The wooden case makes it possible to store with all of the loose pieces. Overall, I am very pleased with it.
    Comment 14 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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