Machinists and toolmakers, this 17-piece angle block set is one of those workshop essentials that just makes precision work so much easier. You get every angle you're likely to need - from tiny 1/4 degree increments all the way up to 45 degrees, plus two zero-degree blocks for reference. The accuracy is impressive at within 0.0003 per inch, which is exactly what you need for serious machining work. Made from hardened steel that's HRc 45-50, so these aren't going to wear out or lose their precision anytime soon. The blocks measure about 9.5x11.5x1.5 inches overall, giving you substantial surfaces to work with for setting up grinding operations, milling machine work, inspection tasks, or any situation where precise angles are critical. The set includes 1/4, 1/2, 1, 2, 3, 4, 5, 10, 15, 20, 25, 30, 35, 40, and 45 degree blocks plus those two flat reference blocks. You can stack them in different combinations to create compound angles for more complex setups. The weight and feel are solid - these aren't flimsy imports that'll let you down when precision matters most. Perfect for machine shops, fabrication facilities, or serious home workshops where measurements need to be dead-on. The blocks come packaged securely to prevent damage during shipping. If you do any kind of metalworking, woodworking with precision requirements, or inspection work, having a comprehensive angle set like this saves so much time compared to calculating and setting up angles manually. The quality is noticeable as soon as you handle them - smooth surfaces, sharp edges, and consistent dimensions throughout the set.