| Model | Units | Range | Number of Leaves | Type | Composition of Leaves |
| 188-101 | Inch | 4 - 42 TPI | 30 leaves | Whitworth Screw Pitch Gages (55˚) | 4, 41/2, 5, 51/2, 6, 7, 8, 9, 10, 11, 111/2, 12, 13, 14, 15, 16, 18, 20, 22, 24, 26, 27, 28, 30, 32, 34, 36, 38, 40, 42 TPI |
| 188-102 | Inch | 4 - 42 TPI | 28 leaves | Whitworth Screw Pitch Gages (55˚) | 4, 41/2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 32, 34, 36, 40, 48, 60 TPI |
| 188-111 | Inch | 4 - 42 TPI | 30 leaves | Unified Screw Pitch Gages (60˚) | 4, 41/2, 5, 51/2, 6, 7, 8, 9, 10, 11, 111/2, 12, 13, 14, 15, 16, 18, 20, 22, 24, 26, 27, 28, 30, 32, 34, 36, 38, 40, 42 TPI |
| 188-121 | Metric | 0.4 - 7mm | 18 leaves | Metric Screw Pitch Gages (60˚) | 0.4, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7mm |
| 188-122 | Metric | 0.4 - 7mm | 21 leaves | Metric Screw Pitch Gages (60˚) | 0.4, 0.5, 0.7, 0.75, 0.8, 0.9, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7mm |
| 188-130 | Metric | 0.35 - 6mm | 22 leaves | Metric Screw Pitch Gages (60˚) | 0.35, 0.4, 0.45, 0.5, 0.6, 0.7, 0.75, 0.8, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6mm and 60° angle gage |
| 188-151 | Inch/Metric | 0.4 - 7mm / 4 - 42 TPI | 51 leaves | Metric and Unified Screw Pitch Gage Set (60˚) | 51 leaves: Set of 188-122 and 188-111 |
| 188-152 | Inch/Metric | 0.5 - 6mm / 4 - 56 TPI | 28 leaves | Metric and Unified Screw Pitch Gage Set (60˚) | 4, 6, 8, 10, 11, 11-1/2, 12, 13, 16, 20, 28, 32, 40, 56 TPI; 0.50, 0.75, 1.00, 1.25, 1.50, 1.75, 2.00, 2.50, 3.00, 3.50, 4.00, 4.50, 5.00. 6.00 mm |
| 188-153 | Metric | 0.25 - 2.5mm | 28 leaves | Metric Screw Pitch Gages (60˚) | 0.25, 0.30. 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 1.00, 1.10, 1.20, 1.25, 1.30, 1.40, 1.50, 1.60, 1.70, 1.75, 1.80, 1.90, 2.00. 2.50 mm |