I have a dumbbell whose weight can be changed by unscrewing the handle.
I have a dumbbell whose weight can be freely changed from 2kg to as much as 32kg by unscrewing the handle.
並ぶ順番は英語で違いますが:
a dumbbell whose weight can be changed by unscrewing the handle
持ち手をひねると重さを変えられるダンベル と言う意味です。
a dumbbell ・ whose weight ・ can be changed ・ by unscrewing the handle
ダンベル・その重さ・が変えられる・持ち手をひねると
で "I have"「持っています」を足すだけで:
I have a dumbbell whose weight can be changed by unscrewing the handle.
持ち手をひねると重さを変えられるダンベルを持っています。
もっと詳しく言いたいと:
I have a dumbbell whose weight can be freely changed from 2kg to as much as 32kg by unscrewing the handle.
"changed" の前に "freely" を入れると「自由に変えることができる」になります。
from 2kg = 2㎏から
to as much as 32kg = 32㎏までも
で「2Kgから32Kgまで自由に変えることができる」の意味を含めます。