The Xcelite TCMB100STW Tool Kit contains 53 individual hand tools, 31 Series 99® interchangeable screwdriver/nutdriver blades and handles, and 2 specialized screwdriver/nutdriver kits. Extra large roller bearing wheels (3 5/8") with wide base offer maximum stability and easy transport over rough pavement or stairs. The extension handle locks in place automatically when extended and retracted. Easy one-handed release. Two tote handles for convenience. Both are spring loaded for protection.