Proto JH4-250RB Electronic Interchangeable Head Torque Wrench Assembly 1/4" DriveProto JH4 250RB Description This electronic interchangeable head torque wrench assembly provides digital torque measurement with an LCD display, visual alert lights, and an audible tone to help apply consistent torque across multiple unit settings. Proto JH4 250RB Includes (1) Electronic interchangeable head torque wrench assembly Proto JH4 250RB Features Electronic torque measurement with LCD screen Visual alert lights and audible tone for feedback