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== Punch Down Tool ==The punch down tool is an impact tool that pushes the wire into the metal receiver of the block and cuts off the excess wire. == Punch Down Block ==For a D-Mark the telco may use a Punch Down Block such as the 66 Block. Some installations pull a Cat.3 or Cat.5 cable in which has 4 pairs of wires and they are wrapped from top to bottom of the punch down, provide for 4 phone lines, multiple phone connections for each line all the way down the block.=== Bridging Clip ===Used on a punch down block to bridge the left side incoming connection to telephones or other telephony devices connected on the right side of the punch down block (via wired to jacks).