115PCS HSS Number drill bits and Letter twist drill bits set in metal box
FEATURES
1.Comprehensive Kit
2.High-Speed Steel (HSS) Construction
3.PRECISION AND ACCURACY
4.Organization and Storage
5.Durability and Longevity
6.easy transportation and storage
29PCS IMPERIAL SIZES:(1/16"---1/2")
26PCS LETTER DRILL BITS SIZES:(A----Z)
60PCS NUMBER DRILL BITS SIZES:(1---60）
PROCESS FLOW
factory
| Diameter (mm) | Flute Length (mm) | Overall Length (mm) | Diameter (mm) | Flute Length (mm) | Overall Length (mm) | Diameter (mm) | Flute Length (mm) | Overall Length (mm) | Diameter (mm) | Flute Length (mm) | Overall Length (mm) |
| 0.5 | 6 | 22 | 4.8 | 52 | 86 | 9.5 | 81 | 125 | 15.0 | 114 | 169 |
| 1.0 | 12 | 34 | 5.0 | 52 | 86 | 10.0 | 87 | 133 | 15.5 | 120 | 178 |
| 1.5 | 20 | 43 | 5.2 | 52 | 86 | 10.5 | 87 | 133 | 16.0 | 120 | 178 |
| 2.0 | 24 | 49 | 5.5 | 57 | 93 | 11.0 | 94 | 142 | 16.5 | 125 | 184 |
| 2.5 | 30 | 57 | 6.0 | 57 | 93 | 11.5 | 94 | 142 | 17.0 | 125 | 184 |
| 3.0 | 33 | 61 | 6.5 | 63 | 101 | 12.0 | 101 | 151 | 17.5 | 130 | 191 |
| 3.2 | 36 | 65 | 7.0 | 69 | 109 | 12.5 | 01 | 151 | 18.0 | 130 | 191 |
| 3.5 | 39 | 70 | 7.5 | 69 | 109 | 13.0 | 101 | 151 | 18.5 | 135 | 198 |
| 4.0 | 43 | 75 | 8.0 | 75 | 117 | 13.5 | 108 | 160 | 19.0 | 135 | 198 |
| 4.2 | 43 | 75 | 8.5 | 75 | 117 | 14.0 | 108 | 160 | 19.5 | 140 | 205 |
| 4.5 | 47 | 80 | 9.0 | 81 | 125 | 14.5 | 114 | 169 | 20.0 | 140 | 205 |
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