10 Pair 1/8" x 5" x (1/2" to 1-5/8") Matched Machinist Parallel Block Tool Set

Specification:
Material: 40Cr Steel
Hardness: HRC52-58
Parallelism: 0.0002"
Tolerance of Size: ±0.0003"
Features:
Accuracy machinist parallel block tool set, very suitable for machinists, woodworking, metal working work, accurate and easy to clean
The parallel blocks are packed in box with a layer of rust-proof wax paper, which is easy to clean and has a good surface finish
Package Includes:
2Pcs 1/8" x 5" x 1/2" (13/64" hole)
2Pcs 1/8" x 5" x 5/8" (1/4" hole)
2Pcs 1/8" x 5" x 3/4" (5/16" hole)
2Pcs 1/8" x 5" x 7/8" (5/16" hole)
2Pcs 1/8" x 5" x 1" (5/16" hole)
2Pcs 1/8" x 5" x 1-1/8" (3/8" hole)
2Pcs 1/8" x 5" x 1-1/4" (3/8" hole)
2Pcs 1/8" x 5" x 1-3/8" (7/16" hole)
2Pcs 1/8" x 5" x 1-1/2" (1/2" hole)
2Pcs 1/8" x 5" x 1-5/8" (1/2" hole)
Note:
Do not store them in a humid environment, even if you do not use them, you should brush oil regularly to prevent rust