Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Basically I had to use a breaker last weekend, it was clear I did not need the “heavy duty” as I did not have 6” of solid concrete, but the descriptions of the other options confused me.

share|improve this question
There is some good information on WikiPedia – Tester101 Jan 16 '12 at 17:58
up vote 11 down vote accepted
  • The SDS chuck system was the original developed by Bosch.

  • SDS Plus is an improvement on the original SDS system, but remains compatible with SDS bits, and is now the most commonly seen on the market.

    SDS Plus

  • SDS Max is designed for the heaviest masonry work, and is incompatible with SDS/SDS+ bits.

    SDS Max

It sounds like for your application, SDS Plus would be the way to go, given that they are generally less expensive, and you don't have really tough masonry work to do.

share|improve this answer
Pictures would make this answer more awesome. – Tester101 Jan 18 '12 at 15:58
Done. Hopefully these are helpful. – Shawn Furyan Jan 21 '12 at 2:50

For easier identification:

SDS and SDS plus are 10 mm diameter - and interchangeable.
SDS Max is 19 mm diameter

SDS Max is for heavier work, with 4 times the cross section shank.

share|improve this answer
Sds Max is 18, not mentioned 19mm – user18079 Nov 12 '13 at 18:33

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.