钩

Left metal radical, the simplified left-side form of 金. It supplies the meaning: 钩 is a metal hook - fish hook, meat hook, hanger. The radical anchors a vast metals-and-tools family: 钉 (nail), 针 (needle), 锁 (lock), 链 (chain), 锤 (hammer), 铁 (iron). Anywhere you see 钅 on the left, expect a metal object or tool.

Right 勾 supplies the sound - exact match gōu with no drift. 勾 itself pictures a hooked or curled wrap, and even by itself means 'to hook, to check off'; its semantic content is identical to that of 钩. So 钩 is essentially 'metal' added to 'hook' - a metal hook, the noun, distinguished from the verb-side 勾. Same phonetic family: 沟 (ditch), 够 (enough), 构 (frame).