WOHLHAUPTER Boring and Facing Heads (as used, for example, on SIP and similar high-precision Jig Borers) Operating Instructions. Two Editions covering the Types: UPA-1, UPA-2, UPA-3, UPA-4, UPA-4S5, UPA-5S6, UPA-6 and UPA-6S7 includes a copy of the maker's comprehensive Sales and Specification Catalogue.