Vintage Western Auto Wizard whatizit?

[IMCA38]

Presently, I’m going through my Dad’s shop tools in preparation for an auction. I’ve come across 3 “ screwdrivers” marked Wizard (so I assume Western Auto). The markings on the handles say Wizard H1333D, Wizard H1335D, and Wizard H1336D. They range in length from 7” to 10 1/2” long. The tips are shaped somewhat like a bow tie when viewed from the end.
My guess is that they are either made to fit some kind of specialty fastener, or for reaming out holes.
Can anyone please provide some insight?
Thanks!

 

[d42jeep]

Those are clutch head screwdrivers. They were used on older GM trucks and some motor homes along with a few other applications. I have quite a few in various brands.
-Don

 

[IMCA38]

Thank you, sir!
Much appreciated

 

[Skyman]

Yep, clutch head. I don't encounter them often anymore, but did find a half-dozen of them last year.

Steve

 

[Provincial]

I have found those fasteners on Sun test equipment.

 

[driftpin]

Doing the disassembly on a '57 Chevy Nomad, I needed three different sizes of clutch heads for trim removal, including the 'fool the inexperienced gas station attendant' hidden gas filler behind the left taillight. Some inside trim had the smaller sizes, and the chrome on the hood and the reinforcement brackets had the largest clutch head screws. When NAPA couldn't get me a set of screwdrivers I bouhgt a set of 4 off the 'net. Decent quality.

 

[engineer2]

I once had a 1975 GMC van that used clutch fasteners for some of the interior trim.

 

[four.cycle]

These are the models of clutch-head screwdrivers and clutch-head bits that were manufactured by Indestro, the OEM supplier for your "Wizard" brand clutch-head drivers:


Indestro clutch-head screwdrivers - 1971 Indestro catalog No. 55

Indestro Clutch-Head Screwdrivers and Drive Bits