3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI
Thread, 7100135956 
Dynabrade 78601 3/8" Dia. x 2" W x 1/8" Center Hole, 180 Grit, 100/pack 
Insize 4144-315, GRANITE SQUARE, 12.4×12.4″, 6928640320538
$1,315.31
12.4″ x 12.4″
1.575″ Thick
4 Holes in Square
Related products
Measuring/ Inspection Instruments
Insize 2771-S90, SQUARE (zero setting, optional), 6940561979596
$28.77
Measuring/ Inspection Instruments
Insize 4702-1, SQUARE SET, includes 4794-025, 4794-040, 4790-075 and 4700-100, 6928640318467
$194.09