Check the listing for details. BOSCH BH2770VCD Demolition Hammer 21TY30. Condition: New. Listed at 2988.66 USD. Breaker Hammer Kit, Handle Type T-Handle, Chuck Style 1 1/8 in Hex, Impact Energy 43 ft-lb, Maximum Blows per Minute 1,000 bpm, Tool Weight 63.2 lb, Current 15 A, Number of Speed Settings 1, Sound Level 105 dB, Voltage 120V AC, Power Source Corded, Kit Contents (1) Bare Tool, (2) Narrow Chisels, (2) Star Point Chisels, Minimum Blows per Minute 0 bpm, Application Foundation Removal, Asphalt Work, Blows per Minute 0 to 1,000, Motor Type Electric, Overall Height 6 in, Overall Width 25 in Hex-drive demolition hammers have a chuck that accepts hex shank demo bits. The chuck tightly grips the flats of the shank for a secure hold. Hammers with a 1-1/8" hex drive are breaker hammers or pavement breakers (sometimes called jackhammers) that provide more impact energy than demolition hammers with a 3.