Your cart is empty.
Your cart is empty.
MATCHED PAIR, Professional Quality Tool Set
Hardened and precision ground 1" x 2" x 3" Block Set. This matched pair of blocks is ground to tolerances of .0003". 23 holes (5 tapped 3/8"-16 TPI and 18 plain).
Features:
- Precision ground and case hardened on all six sides
- Squareness on all sides within 0.0001"
- Surface finish from 6 to 16 microinches
- 23 through holes (5 tapped 3/8"-16 TPI and 18 plain)
- Includes:
- Matched pair 1-2-3 blocks
- 5 3/8"-16 bolts
- Allen wrench
- Protective Case
Patrick West
Reviewed in the United States on February 14, 2022
These blocks are very accurately milled to size; if you're at the point where the imperfections matter, you're well beyond the use of 1-2-3 blocks, anyway.The holes are a different matter entirely. The tapping starts at entirely random positions in all of the five tapped holes in both blocks, which forces a substantial gap and offset when actually attempting to bolt the blocks to each other or anything else; the threads on the ones I received are so badly mismatched that using more than one bolt causes the rest to bind completely. Inconveniently, the untapped holes are undersized for the provided bolts, negating any quick setup benefit they might've provided. Even the countersinks look like they were made by some poor schmuck with a hand drill and a dull bit.
William L Campion
Reviewed in the United States on March 6, 2021
Each of the two 1-2-3 blocks provided has treaded and none threaded holes, Ideally, you would want to use the bolts to 'connect' the two provided blocks together if needed. However, the nonthreaded holes in the blocks are undersized and are too small for the treaded bolts to fit through the nonthreaded holes in order to be used to connect the two blocks together. So the question is, why provide the bolts that are not usable.
Recommended Products
