When Steve mentioned that, i reckon it's not as strong as the Chiruwa handles, like what killa_concept said, without rivets or exposed tang.
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someone once said the normal village made stub tang which only goes partway thru the handle and is held on only by the laha glue will need replacing every 5-10 years of constant hard labour. (and that's nepali hard, not lazy american hard

). many SE Asian weapons have stub tangs and have been used in battle and in normal day to day living without problems for centuries. nothing wrong with them if they are made and fitted correctly. HI do have a few decorative models with stub tangs, but as far as i know, they are all pinned and are not intended for heavy use. they occasionally will offer well made village made models (not made directly by HI) to support more of the non-HI kamis that may or may not have stub tangs and are normally a lot cheaper with a somewhat lesser level of final fit and finish.
the standard HI thru tang which is substantial and goes all the way thru & is peened on the end, and also laha'd will last 20+ years of hard labour. they are most like the tangs on 18 and 19th century military swords before they became obsolete on the battlefield.
the chiruwa slab-sided & riveted tang should last a lifetime or two.
they do not make rat-tail tangs consisting of a threaded soft iron rod badly welded to the blade like in the el-cheapo use once then throw away knives.
some prefer the thru tangs as they offer some cushion for the impact. chiruwa tangs pass all the shock directly to your hand. some say the balance is better on one or the other, but that is subjective.
anyway on the chiruwa, the rivets go thru holes in the tang which reduce the cross section of metal. probably not much different in functional cross section than a grip of the same size in a peened thru tang.
all in all, whichever style tang you choose, all HI product is more than substantially made for anything you are likely to use it for.