Two Hole Pins. Small. 1/2" by 1-1/8" Aluminum. Turned and tapered on threads for extreme accuracy. Threads are machine tapered on ends. 6061 aluminum construction, with 1/2"-13 Zinc coated threads. Threads are removeable for custom lengths, or materials. Fits 1/2" to 1-1/16" I.D. holes. Comes in a 3X3X2 inch tuck top box. Half the weight of steel pins.