Gardner Bender® Slug-Out™ Mechanical Knockout Driver

Unprecedented Portability and Power for Precision Hole Punching

Request a quote Q & A
We Guarantee to Have the Best Price

What's special about this hole cutter?

  • Just attach this to your 3/8" drill and go to create clean knockouts in metals (up to 10 gauge steel)
  • Works with standard knockout sets and draw studs
  • Portable size saves plenty of space over large, bulky hydraulic assemblies
  • Angled design with dual drive allows more flexibility for awkward applications, ensuring most jobs will be covered
  • Field-replaceable draw stud ensures a smooth workflow
  • Click for More Features
Made in USA

The Slug-Out™ Knockout Driver by Gardner Bender® turns any 3/8" drill into a powerful hole-making device. Simply attach the Slug-Out to your drill, attach any standard knockout and draw stud, and drill as usual for smooth, accurate holes in metals of all types.

Part #DescriptionWeightPrice
GB-KOMD1Slug-Out Knockout Driver
Includes: mechanical driver, case and draw stud
12 lbs
GB-KOM520ASlug-Out Knockout Driver
Includes: mechanical driver, 1/2"-2" knockout set, adapter, step bit, case and draw stud
15 lbs
GB-KOM540ASlug-Out Knockout Driver
Includes: mechanical driver, 1/2"-4" knockout set, adapter, step bit, case and draw stud
38 lbs
  • Heavy duty all-metal construction provides a long service life under rough workout conditions
  • Ideal for creating quality knockouts in electrical, plumbing, HRO, contracting, and other commercial applications
  • Proudly made in the USA US flag


Mechanical Driver Yes Yes Yes
Case Yes Yes Yes
Draw Studs Yes Yes Yes
Adapter - Yes Yes
Step Bit - Yes Yes
Knockout Set - 1/2" to 2" 1/2" to 4"
Dimensions 6" H x 18" W x 19.2" L 6" H x 18" W x 19.2" L 6" H x 18" W x 19.2" L
Weight 11.6 lbs (5.3 kg) 15.8 lbs (7.2 kg) 36.2 lbs (16.4 kg)






we will beat a competitor's quote by 5%

Did you know that we can give you a quote for most of our products, including shipping?

You can also call us toll free 866.222.0030

Questions & Answers

Do you have any questions about this product?
Let our experts and customers resolve all your doubts

What can make this page better?

We do everything we can think of to provide you with the product specs, images and ordering info you need, but if we're missing something or still have room to improve, please let us know. Your comments, suggestions and questions are the best tools we have for serving you better!