The TK1 Tool Kit #A-2053-7531. It is included with the MP1, MP3, MP4, MP7, MP8, MP9, MP10, MP11, MP12, MP14, and LP2 Probes includes:

• Stylus tool ∅1.98mm
• 1.5 mm A/F hex key
• 2.0 mm A/F hex key
• 2.5 mm A/F hex key
• 3.0 mm A/F hex key
• 4.0 mm A/F hex key