- 3M
- Accutools
- AEMC Instruments
- Amprobe Instruments
- AO Safety
- Bacharach
- Bayco Products Inc.
- Comfort Crawl
- Cooper-Atkins
- Craftsman Book Company
- EDTM
- Extech Instruments
- Fieldpiece Instruments, Inc.
- Fluke Corporation
- Gardner Bender
- General Tools Mfg.
- Greenlee
- HomeTech
- HSI
- Ideal
- Inficon, Inc.
- Kanomax
- Klein Tools
- Klenk
- MA-Line
- Malco Products, Inc.
- Microchek
- Nova Systems
- Paladin
- Protimeter
- Raytek
- Regin
- Robinair, SPX Corporation
- Santronics
- Show Me How
- Streamlight
- Supco
- SureFire
- Taunton Press
- Telesteps
- Testo
- TIF
- Toro
- TPI
- Tramex
- UEI
- Ullman
- Uniweld
- Vaisala
- Veto Pro Pac
- Woodhead
- Xtend N Climb
- Yellow Jacket/Ritchie Eng.