How to unscrew these square hole nuts?

[pollux]

FWC campers has a lot of these uncommon nuts inside with 1/8 inch square holes all over.
i cannot unscrew these nuts with hex keys to do repair or changing parts.
can someone tell me what kind of key i can use to unscrew them? thanks

 

[Wandering Sagebrush]

Looks like a deck screw bit would do the job. A set is under $10, and should cover your needs. I believe they’re called Robinson bits.

 

[longhorn1]

I purchased a screw driver at Menards back in 2014. Most places carry them. JD

FWC campers has a lot of these uncommon nuts inside with 1/8 inch square holes all over.
i cannot unscrew these nuts with hex keys to do repair or changing parts.
can someone tell me what kind of key i can use to unscrew them? thanks

 

[pollux]

i ordered from Amazon.

GreatNeck CRO2 Robertson #2 Square Tip Screwdriver | Must Have for Repairing Anything Using Square-Head Screws, Common Around the House, in Campers, on Toys, and in Cars


Thank you all!

 

[Taku]

Most lumber supply stores should have bins of all these type of bits and Star bits. I usually grab a few every other time in the store since they can wear out quickly.

 

[Vic Harder]

Robertson screw head, most common screw in Canada