Cordless rotary SDS hammers
If hard concrete is what you're dealing with, a rotary hammer is what you need. Unlike normal hammer drills that produce small percussive motions, rotary hammers’ air-powered piston delivers high energy shots to the rotating bit.

20V Powershare 4700bpm 2.0J Cordless Brushless Rotary Hammer Drill - Tool Only
20V 2.0J Rotary Hammer Drill - Balanced in size and power - WX381.9


20V PowerShare Cordless Rotary Hammer Drill 6400bpm 1.2J H3 with 2.0Ah Battery and Charger
H3 SDS Rotary Hammer Drill - WX391


20V PowerShare Cordless Rotary Hammer Drill 6400bpm 1.2J - Tool Only
20 V 1.2 J rotary hammer - Lightweight design - WX391.9