{"product_id":"precision-123-blocks-workshop-bundle-4-pack","title":"PRECISION 123 BLOCKS WORKSHOP BUNDLE 4 PACK","description":"\u003cp\u003eThis package includes 2 sets of Precision Blocks (4 PCS Total). \u003c\/p\u003e\n\u003cp\u003eThese 1-2-3 blocks are versatile setup tools for machining, fabrication, inspection, layout, and precision hobby work. Each block is hardened, heat treated, and precision ground on all six sides to provide the durability and accuracy needed for repeatable workshop setups.\u003c\/p\u003e\n\u003cp\u003eWith five 3\/8\"-16 tapped holes and eighteen untapped holes per block, they can be used in a wide range of clamping, fixturing, alignment, and positioning applications. Their cross-drilled design helps reduce weight while maintaining practical strength, and the precision-machined surfaces support accurate squaring and parallel setup work.\u003c\/p\u003e\n\u003cp\u003eFeatures\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHardened and precision ground on all 6 sides\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeat treated and case hardened to HRC 58-62\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for setup, inspection, layout, clamping, alignment, and fixture work\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFive 3\/8\"-16 tapped holes per block\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEighteen untapped holes per block\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCross-drilled construction helps reduce weight while maintaining strength\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePrecision machined for accurate squareness and parallelism\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupplied as a matched pair\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSpecifications\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eProduct Type: 1-2-3 blocks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQuantity: 2 blocks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTapped Holes: 5 per block\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThread Size: 3\/8\"-16\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUntapped Holes: 18 per block\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHardness: HRC 58-62\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSurface Finish: Precision ground on all 6 sides\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSquareness Tolerance: Within 0.0001\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eParallelism Tolerance: Within 0.0001\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeight of Pair Tolerance: Within 0.0001\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eComes With\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eOne pair of 1-2-3 blocks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2 blocks total\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFAQ\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are 1-2-3 blocks used for?\u003c\/strong\u003e\u003cbr\u003eThey can be used for machining setups, clamping, alignment, inspection, layout, fixture work, and other precision positioning applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre all six sides precision ground?\u003c\/strong\u003e\u003cbr\u003eYes. Each block is precision ground on all six sides.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow hard are the blocks?\u003c\/strong\u003e\u003cbr\u003eThe blocks are heat treated and case hardened to HRC 58-62 for wear resistance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the blocks have threaded holes?\u003c\/strong\u003e\u003cbr\u003eYes. Each block has five 3\/8\"-16 tapped holes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many untapped holes are in each block?\u003c\/strong\u003e\u003cbr\u003eEach block has eighteen untapped holes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow accurate are the blocks?\u003c\/strong\u003e\u003cbr\u003eSquareness, parallelism, and the height of the pair are each specified to a tolerance within 0.0001\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many blocks are included?\u003c\/strong\u003e\u003cbr\u003eThe set includes one pair, for a total of two blocks.\u003c\/p\u003e","brand":"Busy Bee Tools","offers":[{"title":"Default Title","offer_id":56960077922470,"sku":"B4463PP","price":25.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/9643\/0502\/files\/ChatGPTImageAug14_2026_03_05_24PM.png?v=1786734333","url":"https:\/\/www.busybeetools.com\/products\/precision-123-blocks-workshop-bundle-4-pack","provider":"Busy Bee Tools","version":"1.0","type":"link"}