Item Type: Boring Bar_x000D_ Quantity: 9Pcs_x000D_ Material: High speed steel_x000D_ Base Size: Approx. 72 x 55 x 30mm / 2.8 x 2.2 x 1.2in_x000D_ Base diameterHeightDrilling depthSmallest hole_x000D_ 12mm / 1/2in57.1mm / 2.2in19mm / 0.7in7.9mm / 0.3in_x000D_ 12mm / 1/2in66.6mm / 2.6in28.5mm / 1.1in7.9mm / 0.3in_x000D_ 12mm / 1/2in76.2mm / 3in38.1mm / 1.5in7.9mm / 0.3in_x000D_ 12mm / 1/2in66.6mm / 2.6in28.5mm / 1.1in11.1mm / 0.4in_x000D_ 12mm / 1/2in80.9mm / 3.2in42.8mm / 1.7in11.1mm / 0.4in_x000D_ 12mm / 1/2in95.2mm / 3.7in57.15mm / 2.3in11.1mm / 0.4in_x000D_ 12mm / 1/2in76.2mm / 3in38.1mm / 1.5in13mm / 0.5in_x000D_ 12mm / 1/2in95.2mm / 3.7in57.1mm / 2.2in13mm / 0.5in_x000D_ 12mm / 1/2in114.3mm / 4.5in76.2mm / 3in13mm / 0.5in_x000D_ _x000D_