The method of holding the dial gauge comes in two types; holding the stem and holding the lug of the back. However, the back may be replaced for convenience of holding.
Center lug back
| Part No. | Outer dia. (Ømm) | Dial Gauge installable |
| GB-1A | 46.0 | 107, 107Z, 17Z, 57, 17, 17B 5Z, 15Z, 207S, 207W, 18, 5B |
| GB-115 | 50.2 | 25S |
| GB-125 | 59.5 | 25, 55, 207 |
| GB-1307 | 69.8 | 307 |
| GB-1507 | 76.7 | 507, 509 |
| GB-1809 | 105.0 | 809 |
| GB-147 | 30.7 | 47, 47Z, 47SZ |
| GB-136 | 35.8 | 5S, 36A, 36B |
| GB-157S | 35.3 | 57S |
| GB-1DX | 50.2 | 55DX, 56, 107DX, 307S, 5DX |
Flat back
| Part No. | Outer dia. (Ømm) | Dial Gauge installable |
| GB-3A | 46.0 | 107, 107Z, 17Z, 57, 17, 17B 5Z, 15Z, 207S, 207W, 18, 5B |
| GB-315 | 50.2 | 25S |
| GB-325 | 59.5 | 25, 207 |
| GB-355 | 59.5 | 55 |
| GB-3307 | 69.8 | 307 |
| GB-3507 | 76.7 | 507, 509 |
| GB-3809 | 105.0 | 809 |
| GB-347 | 30.7 | 47, 47Z, 47SZ |
| GB-336 | 35.8 | 5S, 36A, 36B |
| GB-357S | 35.3 | 57S |
| GB-3DX | 50.2 | 55DX, 56, 107DX, 307S, 5DX |
Post Back
| Part No. | Outer dia. (Ømm) | Dial Gauge installable |
| GB-4A | 46.0 | 107, 107Z, 17Z, 57, 17, 17B 5Z, 15Z, 207S, 207W, 18, 5B |
| GB-447 | 30.7 | 47, 47Z, 47SZ |
Screw back
| Part No. | Outer dia. (Ømm) | Dial Gauge installable |
| GB-5A | 46.0 | 107, 107Z, 57, 17, 5B, 5Z, 17B 15Z, 207S, 207W, 18 |
| GB-547 | 30.7 | 47, 47Z, 47SZ |
| GB-536 | 35.8 | 5S, 36A, 36B |
| GB-557S | 35.3 | 57S |
Adjustable back
| Part No. | Outer dia. (Ømm) | Dial Gauge installable |
| GB-6A | 46.0 | 107, 107Z, 57, 17, 5B, 5Z, 17B 15Z, 207S, 207W, 17Z, 18 |
| GB-625 | 59.5 | 25, 55, 207 |
| GB-647 | 30.7 | 47, 47Z, 47SZ |
| GB-636 | 35.8 | 5S, 36A, 36B |
| GB-657S | 35.3 | 57S |
Lug back with lever
| Part No. | Outer dia. (Ømm) | Dial Gauge installable |
| GB-7A | 46.0 | 107, 107Z, 57, 17, 5B, 5Z, 17B 15Z, 17Z, 18 |
