2 Holes Lacing Hooks are used for securing and tying removable insulation blankets or covers, the diameter is 7/8"(22mm), they are in standard with two 3/16" Diameter holes and 1/2" Apart. they are stamped with NO AB to indicated non asbestos material. 

2 Holes Lacing washers are used with stainless steel tie wires to fabricate removable/reusable insulation blankets or covers. the diameter is 1"(25mm), they are standard with two 3/16" diameter holes and 1/2" apart.  they are stamped with NO AB to indicated non asbestos material. 

They are available in stainless steel, other materials and sizes are available by special order