noun
A saw with a fine-toothed blade for cutting metal. Often used in metalworking and DIY contexts.
See also: 金鋸
金切り鋸で鉄パイプを切った。
I cut the iron pipe with a hacksaw.
金鋸 is a shorter, more common term for a hacksaw. 金切り鋸 is a longer, more explicit form, literally 'metal-cutting saw'.
Compound of 金切り (かねきり, 'metal cutting') + 鋸 (のこぎり, 'saw'). The exact historical derivation is uncertain, but the term transparently describes a saw for cutting metal.