?2 Operation modes: Operation mode change lever positioned on the bottom of gear housing for reduced possibility of breakage.USER BENEFITS:2 operation modes ? hammering with rotation and rotation only.Less bit wobbling.One-touch sliding chuck for easy bit change.Operation mode change lever positioned on the bottom of gear housing for reduced possibility of breakage.Double Insulation, Variable Speed, Reversing, SDS Plus, Torque Limiter and Carry Case. Tool sold without bit.