<https://forums.alpinesnowboarder.com/topic/36702-steel-heel-receivers-catek-bomber-and-burton-compatible/#comment-378691>
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"I have seen these in use before and they are soft, ie: they bend easily if kicked by your boot and can lead to improper engagement so use at your own risk. I think they are stainless, but not hardened like the Bombers which will not bend. I think you would be better off machining some Bomber receivers. Better safe than sorry. "
<https://forums.alpinesnowboarder.com/topic/36702-steel-heel-receivers-catek-bomber-and-burton-compatible/>