Marine Tool Kits Overview Model Number Description Number of Tools Measurement RBA39M Marine Kit Number of Tools: 135 RBTM2 The Marine Essentials Kit Number of Tools: 56 Metric RBTM3 Yacht Essentials Kit Number of Tools: 66 Imperial (SAE / Standard) / Metric RBTM3-2 Yacht Essentials Kit, Extra Number of Tools: 83 Metric RBTM4 Yacht Enhanced Kit Number of Tools: 70 Imperial (SAE / Standard) / Metric RBTM5 Yacht Comprehensive Kit Number of Tools: 101 Imperial (SAE / Standard) / Metric RBTM6 Cruising Yacht Kit Number of Tools: 44 Metric RBTM7 Yacht Comprehensive Kit Two Number of Tools: 105 RBTM8 Marine Electrical Tool Kit Number of Tools: 48 RBTM9 Boat Building Cabinet Number of Tools: 138 Imperial (SAE / Standard) / Metric