A drill having three or four helical flutes with a    s t a n d a r d          m o r s e   t a p e r   s h a n k designed for out enlarging holes.

Dimensions in mm
(They can also be manufactured as per US and EU standard sizes and specifications)

Dia in MM Cutting Edge Length Overall Length Morse Taper No
7 69 150 1
8 75 156 1
9 81 162 1
10 87 168 1
11 94 175 1
12 101 182 1
13 101 182 1
14 108 189 1
15 114 212 2
16 120 218 2
17 125 223 2
18 130 228 2
19 135 233 2
20 140 238 2
21 145 243 2
22 150 248 2
23 155 253 2
24 160 281 3
25 160 281 3
26 165 286 3
27 170 291 3
28 170 291 3
29 175 296 3
30 175 296 3
31 180 301 3
32 185 334 4
33 185 334 4
34 190 339 4
35 190 339 4
36 195 344 4
37 195 344 4
38 200 349 4
39,40 200 349 4
41 205 354 4
42 205 354 4
43 210 359 4
44 210 359 4
45 210 359 4
46 215 364 4
47 215 364 4
48 220 369 4
49 220 369 4
50 220 369 4