Forget lugging around a bag full of tools, the Octopus 17 'n 1 Tech Tool can handle everything. Perfect for tightening or loosening screws and hex nuts on bridges, saddles, locking nuts, output jacks, control pots, tuning machine bushings, lots more. The ergonomic handle is made from strong ballistic nylon that won't scratch or ding your hardware and is engineered with the most popular hex wrench sizes: 10mm, 12mm, 14mm, 1/2" & 7/16", plus a second 1/2" narrow profile hex wrench for tightening tough to reach sunken pots & tele cups. The universal adapter fits into the handle and features a 7th 1/4" hex wrench, which securely holds the 10pc screwdriver bit set. Includes Phillips & flat head bits along with 8 Allen key bits: .050", 1/16", 3/32", 1.5mm, 2.0mm, 2.5mm, 3.0mm, and 4.0mm. Tackles any job including precision adjustments to tremolo systems. A must have for every instrument case.