When playing golf, categorize each of the following items as "useful" or "useless": Irons, putter, dumbbell, tees, skis, range finder, jeans, kayak.
Irons: Useful
Putter: Useful
Dumbbell: Useless
Tees: Useful
Skis: Useless
Range Finder: Useful 
Jeans: Useless
Kayak: Useless
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: When playing golf, categorize each of the following items as "useful" or "useless": Irons, putter, dumbbell, tees, skis, range finder, jeans, kayak.
### Input: 
### Response: Irons: Useful
Putter: Useful
Dumbbell: Useless
Tees: Useful
Skis: Useless
Range Finder: Useful 
Jeans: Useless
Kayak: Useless