Help ID an old old school fu movie I saw as a kid

[chino]

This I watched back when I was little on Kung Fu theater Saturday mornin. I hesitate to say it was called Invincible Chinese Brothers, but I've googled variations of the names, and what came up didn't seem like it. So basically it's an old school flick with these 3 brothers and a master, and basically they got their butts kicked and eventually they start training more, their master makes them sit in boiled water or whatever for extended time, and other painful trials.

Well this makes their bodies all invincible, as they fight goons who attack them with swords and spears and every other weapon and the sword just breaks when it hits their skins and spears bounce off like rubber. Well they finally fight this master who kills 2 of them I think from discovering that sure they soaked in boiling water what not but the only vulnerable spot was their butt crack and he lunged his sword into them and they died.

Anachronisitcally, like cops show up with guns at the end and the 3rd invincible brother gets shot and that was the end of that. What I remember. Seriously folks I'm not making this up. Anyone seen this before? And what is it called etc? Thanks in advance!

[Tengu440]

It sounded like SHAOLIN AVENGERS (aka Invincible Kung Fu Brothers) right until the end, there. There are 3 "brothers" (two blood and one sworn), but only one of them, Fong Sai Yuk (Fu Sheng), really gets the "invulnerability by being locked in a tub of boiling water/herbs). Against the end villain he does indeed expire from a sword up the butt, and only one brother remains standing ...

... but he isn't shot by cops or anything bizarre like that.

[chino]

Wow thanks! I'll have to check it out. That sounds like the same movie. Maybe I mixed the ending up with Monty Python and the Holy Grail or something. I mean those 2 genres are so alike.