The Toolbox Murders is at times a rather unpleasant but compelling splatter gore / psychological horror movie, controversial in it's time and banned in the UK for awhile (one of the first so-called "video nasties").
A religious maniac starts killing women who he sees as sinful in an apartment block, using the contents of a toolbox (hammer, screwdriver et cetera) to perform his grisly and extremely bloody kills. The murders take place over a rather enjoyable country music soundtrack - which is probably the best part of this film to be honest.
The film makes little sense, you'd think four murders in the same block would have the police descending like a ton of bricks on the place but no they barely seem to investigate the crimes at all.
After the initial twenty minutes or so of mayhem the film slow down a lot and concentrates on the kidnap of a young girl and there is a lot of rather weird dialogue and psychological exploration of the killer's motives. The abrupt change in direction of the film can be a bit jarring (though not as much as a claw hammer to the head) but it somehow all holds together. Thanks to a nail gun no doubt.