Accusize Precision Blocks The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Accusize Precision Blocks: 1-2-3, 2-3-4, 2-4-6, and 25-50-75mm Options with 23 Holes, 11 Holes, 1 Hole, or No Holes. These precision blocks are highly versatile and ideal for precision layout, grinding, and setup work. Thread Sizes, Materials, & Tips Precision Block Thread Size 11-hole blocks feature 5 tapped holes (5/16"-18 for the EG02-0405) for clamping, with 6 untapped through-holes.23-hole blocks include 5 tapped holes (3/8"-16 for EG06-0411 & EG02-0412, and 5/8"-11" for EG06-0415 & EG02-0416) for clamping, plus 18 untapped holes.The drilled hole size for EG02-0406 is 0.500-0.501".The cross-drilling design ensures minimal weight while maintaining maximum strength. Accusize Precision Block Materials Constructed from hardened steel, with a hardness rating of HRC 50–60 on all six sides.Each block is precision ground and hardened on all sides for superior durability and accuracy.These precision blocks are highly versatile and ideal for precision layout, grinding, and setup work. Benefits of More Holes The hole configurations of our precision blocks offer unmatched flexibility. The more holes a block has, the more configuration possibilities you can create by bolting blocks together. Benefits of Less Holes For milling applications where chips, abrasives, coolant, and other debris can enter the holes, blocks with fewer holes or no holes provide a more efficient solution, enhancing productivity by reducing downtime and the need for frequent cleaning. Setup Tools For Milling Our 1-2-3 Precision Blocks are precision ground to exact measurements of 1 inch by 2 inches by 3 inches, while the 2-3-4, 2-4-6, and 25-50-75mm blocks are equally accurate in their dimensions. These blocks are the go-to standard for machinists when setting up, doing fixturing, or touching off tools. They are ideal for use with a wide range of milling machines' setup tools, including height gauges and test indicators, for calibration and precision measurement during inspections. Previous page Feature Solid Construction Constructed from hardened steel, with a hardness rating of HRC 50–60 on all six sides. Feature Come in pairs Each set has two matched blocks, ensuring perfect alignment and accuracy in every application. Feature More Hole Counts Provide More Configurations The more holes a block has, the more configuration possibilities you can create by bolting blocks. Feature Feedback on Accuracy Users praised the blocks for their accuracy Next page 1 Solid Construction 2 Come in pairs 3 Hole Counts 4 Accuracy Some Inspiring Usage Scenarios Previous page Inspection For professional machine shop, complex projects For Miniature Hobbyist For Woodworking General Usage Next page Use precision blocks for setup, layout, and calibration tasks in machining operations. These hardened, precision-ground blocks ensure exact alignment and positioning for fixturing, measuring, and clamping workpieces. They're essential tools for achieving accurate, repeatable results in metalworking. List of Accusize Precision Blocks 1-2-3 Block, 23 Holes Add to Cart 25-50-75mm Block, 23 Hole Add to Cart 1-2-3 Block, 11 Holes Add to Cart 1-2-3 Block, 1 Hole Add to Cart 1-2-3 Block, No Hole Add to Cart 2-4-6 Block, 23 Holes Buying Options 2-3-4 Block, 23 Holes Add to Cart Customer Reviews 4.7 out of 5 stars 439 4.7 out of 5 stars 18 4.8 out of 5 stars 15 3.4 out of 5 stars 3 4.8 out of 5 stars 19 4.2 out of 5 stars 2 — Price $31.95$31.95 $34.85$34.85 $37.76$37.76 $34.85$34.85 $34.85$34.85 — $90.20$90.20 Size 1-2-3" 25-50-75mm 1-2-3" 1-2-3" 1-2-3" 2-4-6" 2-3-4" Product No. EG06-0411 EG02-0412 EG02-0405 EG02-0406 EG02-0407 EG06-0415 EG02-0416 Count of Holes 23 23 11 1 0 23 23 Parallelism 0.0002" 0.005mm 0.0002" 0.0002" 0.0002" 0.0003" 0.0003" Squareness 0.0003"/1" 0.0075 /25mm 0.0001"/1" 0.0003"/1" 0.0003"/1" 0.0003"/1" 0.0003"/1" Size Range ±0.0002" ±0.005mm ±0.0003" ±0.0002" ±0.0002" ±0.0005" ±0.0003" Auxiliary Tools Previous page Precision Block for Highly Precise Machining Tasks Squareness and parallelism of ±0.0001".Height accuracy in pairs within ±0.0001".Hardened steel construction with a hardness rating of HRC 56-60.Tapped and untapped holes for versatile setup. VIEW Clamping Tool Kit 58 pcs Deluxe Steel Clamping Kits, Table Slot 5/8", Stud Size 1/2"-13, #4230-2626 View Next page The Accusize Ultra Precision 1-2-3 Block Set offers ±0.0001" squareness and parallelism, with height accuracy within ±0.0001". Made from hardened steel (HRC 56-60), it includes tapped and untapped holes for versatility, making it ideal for extreme precision or calibration laboratory standards.