Aluminum magnetic drain plug

I see a lot of magnetic oil drain plugs on ebay and other online retailers. Many of those come pre-drilled for safety wire, which is what I'm really looking for to get my bike ready for track day (drilling my own may be a pain). All of them seem to be made out of aluminum though. Has anybody used any like this? They appear to be popular, but since much of the bolt head is hollowed out and drilled out, I would be worried about the aluminum turning out to be too soft and just shearing off when any real torque is applied. Seen any pre-drilled steel ones?
 
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