Question

He gazed fondly at the set of burglar tools.(voice change)

Answer 1

Here is your answer... 

First of all,
$\bold{what \: is \: passive \: voice}$

Passive Voice simply means that the object of the sentence becomes the subject of the sentence without changing the meaning of the sentence.

For example, He eats a mango.
The given sentence is in active voice . It's passive voice will be..
A mango is eaten by him

Similarly,
According to the question,
He gazed fondly at the set of burglar tools.

Answer
=> The set of burglar tools were gazed fondly by him.

#BeBrainly!!

Answer 2

$hello \: \: mate$

The set of burglar tools were gazed fondly by him .

Thanks ;)