Made of steel, hardened to Rc 58-62. Sizes up to 6" x 6" have 1/4-20 tapped holes, larger sizes have 3/8-16 tapped holes. Models with the suffix "S0, S1 OR S2" are part of the SineSet System, other products with the same part # suffix will bolt directly to these Sine Plates. Gage block rolls have two .200" minute steps for setting small angles with standard gage block sets. Locking strap that always remains below the top surface is standard. Two hardened & ground rails included.

MODEL	SIZE	CENTER DISTANCE OF ROLLS	SQUARE & PARALLEL	WT(#)
SPC-44-S0 SPC-66-S1 SPC-612-S2 SPC-618-S2   SPC-812-S2 SPC-1212-S2 SPC-1218-S2	4" x 4" x 3-1/8" 6" x 6" x 3-1/8" 12" x 6" x 4-3/16" 18" x 6" x 5-3/8"   12" x 8" x 4-3/16" 12" x 12" x 4-3/16" 18" x 12" x 5-3/8"	3" w/i .0002" 5" w/i .0002" 5" &  10" w/i .0002" 5" w/i .0002" & 15" w/i .0003" 5" & 10" w/i .0002" 10" w/i .0002" 10" & 15" w/i .0003"	.0002" .0002" .0003" .0004"   .0003" .0003" .0004"	13 27 71 134   93 137 257

SPECIAL SIZES AVAILABLE UPON REQUEST