This versatile and professional-quality Felo E-Smart insulated screwdriver set is the first compact smart tool for electricians. 12 interchangeable IEC screwdriver blades (Phillips, slotted and Torx blades in various sizes) each snap into a 2-component handle and stay locked in place via a quick-release button that guards against unwanted extraction. Add the precision cap to a blade and turn it into a precision screwdriver for low-torque applications. Each blade tested to 10,000 Volts. Entire set stores in a durable metal box measuring 9in.L x 5in.W x 1 1/2in.H.Pieces: 14qty.Tool Length: Assorted in.Handle Type: Insulated.Case Included :Yes.