I previously asked this question What type of screw is this, How to remove this screw?

and somebody pointed out it was a t30 torx bit.

Here is my t30. I notice both ends of the key are different as per pic. Is one end or the other designed for the screw in the pic? A torx extension on a ratchet will only have one end why do my keys have two and the non circle star seems to be bigger.

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  • I gather it doesn’t fit . Try this ebay.co.uk/itm/… Commented Sep 11, 2020 at 4:05
  • 1
    Those are not Torx wrenches. Commented Sep 11, 2020 at 14:34
  • @blacksmith37 are you referring to the item tony strewart has linked or are you referring to the pictures I have posted in my original question? Even if they are not attachable to wrenches provided they have torx ends they should still work? Thanks. Commented Sep 24, 2020 at 12:41

1 Answer 1


Use the end that fits. If it is a security fastener with a “pin” then use the end with the hole, if no pin then either end will do.

But do make sure it is the correct size, ie it has to fit tightly, a smaller one can “touch” the lobes but with too much gap will round out the fastener. Common sense should be applied.

  • When you say if it is not a security fastener use either end, as I mentioned both ends look different in size and shape slightly. The one with the hole looks smaller. How could either end be ok if they are different in size/shape? I’m assuming your advice to use something that fits refers to using different torx keys atogether rather the two points on the same key? Thanks Commented Sep 11, 2020 at 12:02
  • The end with the hole is a "security" end, a less-common end design. It is used with fasteners that have a pin sticking up from the middle of the recess in the bolt head; this restricts opening to only those users who have the less-common tool. More significantly: as @Blacksmith points out, these are not Torx tools. These tools' shapes are different. To unscrew Torx fasteners, as on your car, you need to obtain Torx tools. Commented Sep 11, 2020 at 14:46

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