Although very much late in the game for an Italian western, (the bulk of which were made between 1965 and 1972) Mannaja (A Man Called Blade) is no slouch. It's actually a good muscular western with lots of violence and dark atmosphere, with the sun blocked out and everything bathed in a fog of dust.
Maurizio Merli plays Blade, a mysterious hatchet wielding bounty hunter with unfinished business to take care of regarding a puritanical mine owner and his psychotic number two, played by John Steiner, who's excellent at portraying nasty weasels.
Also memorable is (the late?) Donal O'Brien, who would later gain infamy as the title character in Doctor Butcher M.D. (Medical Deviate), as a scroungy fugitive who gets his hand cut off by Blade in the first scene and features prominently in the film's finale.
Director Sergio Martino is a master of Italian exploitation and really knows how to deliver the goods, especially in action/adventures. Another of his films I really enjoyed was Slave Of The Cannibal God with Ursula Andress and Stacy Keach.
Also, I really enjoyed the title song even though it was repeated way too often in the course of the film.