Bit size
Inch
(in)
5 7/8
6
61/8
6 1/4
7 7/8
8 3/8
8 1/2
8 3/4
9 1/2
9 5/8
9 3/4
9 7/8
12 1/4
13 3/4
Metric
(mm)
149.2
152.4
155.6
158.7
200.0
212.7
215.9
222.2
241.3
244.5
247.3
250.8
311.1
349.2
Bit type
437
437
437
437
447
417
417
417
417
417
417
417
417
417
517
517
517
517
517
437
437
437
437
437
437
437
437
437
537
537
537
517
517
517
517
517
517
517
517
517
617
617
547
537
537
537
537
537
537
537
537
637
637
617
617
617
617
637
637
637
API Regular Pin
(in)
3 1/2
4 1/2
6 5/8
Recommended make-up torque for bit shank (KN.m)
9.50-12.2
16.30-21.70
37.93-43.30.
Carton or box.
