Overview Reviews Product Description For head bolts, brake caliper bolts, door handle screws, axle bolts and other applications. The 4 and 5mm bits have 5/16" hex drive. The 6, 8, 10 and 12mm bits have 1/2" hex drive. The 14 and 16mm bits have 5/8" hex drive. The 18mm bit has a 3/4" hex drive. The three largest sizes are designed to work on tamper-proof applications. Lisle Tools Catalog Product Videos Custom Field Harmonization code HTS #8207909089 Manufacturing country US Product Reviews Write a Review Write a Review × Lisle 9 Pc. Master Triple Square Bit Set 60850 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *