This jackhammer is BY FAR the best I've ever owned. In fact, I owned two of them! I'm putting my newest one up for sale. It's had regular service at the Makita service center in Hayward. The extension cord and brushes were replaced last year by them.
It hits the hardest and gives off the least vibrations of any breaker I've ever owned. The secret is that the housing has the shock absorbers, not the handles like Bosch and other brands. It is quieter than other jackhammers, too!
Unfortunately, the bits have broken (including replacement bits purchased at Lowe's and Home Depot) so I'm selling the hand truck (which holds up to 4 bits) and the breaker only at this price.
FYI, 1-1/8" hex bits are universal to all jackhammers.
I intend to replace the patio soon so you can use one of my bits from my other breaker and demo it in my backyard! $950.00 OBO
https://www.homedepot.com/p/Makita-70-lb-1-1-8-in-Hex-Advanced-AVT-Breaker-Hammer-HM1812X show contact info