Pro Grade 1-2-3 Block And Thin Parallel Set For Machinists, 23-Hole Hardened Alloy Steel Kit With 2 Blocks And 10 Parallels Sized 1x2x3 Inch, Precision Ground To 0.0002 Inch Tolerance, Includes 3/8-16 Tap Holes For Easy Clamping And Layout
UPC: 00193019658543
✔️ Includes 2 blocks and 10 parallels, hardened alloy steel
Two solid 1x2x3 inch blocks plus ten 1x2x3 inch parallels form a precise layout system for milling, drilling, and inspection work. Made from hardened alloy steel (58-62 HRC) and precision ground on all six surfaces for dependable wear resistance. Stored in a durable aluminum case with shock-proof EVA foam for safe transport.
✅ 23-hole design includes 5 tapped holes for 3/8-16 clamping and 18 untapped holes
✅ 2 blocks and 10 parallels sized 1x2x3 inches with precision ground surfaces
✅ Hardened alloy steel (58-62 HRC) for wear resistance
✅ Chrome finish adds durability and a professional look
✅ Tolerances: size +0.0002 in, parallelism 0.0002 in, height 0.0002 in
✅ Aluminum case with shock-foam for safe storage
💡 What is a 1-2-3 block used for in precision machining? These blocks provide a handy reference surface for layout, squaring, and fixturing, enabling quick setups.
- precise reference surfaces for layout and alignment
- quick squaring of edges and fixtures
- durable hardened alloy steel for long service life
- supports accurate fixture mounting