Hitachi H70sd Heavy Duty Breaker 110vFor 28.5mm(1-1/8\\\") hexagon bit shankAccepts 3 types of tools: Standard, collarless retaining groove and air toolPower input 1,240WCompact among HiKOKI T-handle type demolition hammersShock-absorbing handleDustproof double air vent constructionInternal double insulation