17 pcs precision angle block set 1/4 to 45 degree

17 pcs precision angle block set 1/4 to 45 degree 17 pcs angle blocks set accurate angles quickly. Just load on vise and rest the workpiece at any angle you choose. Made of high quality hardened steel. Precision ground. HARDNESS: HRC56 TO 60 1/4 degree to 45 degree. Accuracy: 0.0003" Including the following degrees of angle block: 1/4, 1/2, 1, 2, 3, 4, 5, 10, 15, 20, 25, 30, 35, 40, 45 and 2 other blocks. Any conveivable angles to these increments can be established. Lightly magnetized for better holding. Fitted in deluxe wooden box.