... 2.Parallelism 0.005mm/100mm 3.Squareness 0.005mm QUICK ACTION PRECISION MODULAR VISES 1.Made of high-quality alloy steel2 ... includes milling chuck series,CNC tool series,collet series,boring heads series,tapping chuck series,pull studs,er nuts,centers,mores ... know.We'll be happy to give you details. QUICK ACTION PRECISION MODULAR VISES