The award winning cybernetic engineering design on Hitachi's new DH40MR has raised the bar for concrete drilling rotary hammers. The cybernetic design increases impact energy to 10 joules or 7.93 ft./lbs., while decreasing vibration and noise levels. This double insulated 1-9/16-inch rotary hammer has 12 different angles you can lock the bit into for demolition work. Variable speed dial controls RPM from 240-480. Maximum core bit diameter is 4-1/8 inch while the tool only weighs 6.5 pounds. The DH40MR comes complete with case and lubrication grease.

• Cybernetic design increases impact energy to 10 joules or 7.93 ft./lbs
• Maximum core bit diameter is 4-1/8 inch; tool weighs 6.5 pounds
• Quiet and low vibration
• Variable speed dial controls RPM from 240-480