3M 26046, PPS Series 2.0 Adapter, Type S15, 3/8 Male, 19 Thread BSP, 7100135334 
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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