Insulated Adjustable TorqueVario-S w/ Window Scale 1.0 - 5.0 Newton Meter Torque Adjustment Tool included. Also requires the SlimLine 28350 Blade Holder for operation (sold separately) Handle size proportioned to optimize torque range Audible and perceptible click when torque setting has been attained +/-6% accuracy Overall length / OAL: 138 mm (5.4")