3M 27720, Cubitron II Roloc Durable Edge Disc 984F, 80+, YF-weight, TSM, Maroon, 1-1/2 in, Die RS150SM, 7000045177, 200 per case 
Insize 2277-2, DOUBLE SQUARE, 6″, 6928640374838
$38.99
Graduation 1/8″, 1/16″,1/32″,1/64″
Accuracy: ?2min for 90? square
Hardened and chrome plated blade
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