Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to lock wire drilled head bolts [title] Decide the length. [step] The length of the piece of wire to be used is determined by the distance between the bolts that need to be lock wired. [title] Cut the length.

Ending1: [step] The wire should be cut to a length that is a little bit longer than twice that distance between the bolts. [title] Take the safety wire, thread one end of the safety wire through one of the holes and pull it back, and thread the other end through another hole in the same bolt and bring them together. Ending2: [step] Starting with the bolt closest to the nose end of the tuning instrument, measure out 15 inch x 20 inch length. [substeps] Don't disturb the tuning instrument during this measurement since this length is also determined in the tweaks above. Ending3: [step] There are three different different lengths of wire and the wire thickness varies greatly. [substeps] 18-20 mm safety-length wire is most commonly used for chains, while 14-20 mm wire is also commonly used for torcs and cutters. Ending4: [step] Pull out a 1/4 inch of wire. The long is long enough to hammer and the shorter is long enough for drilling.

Answer format: ending1/ending2/ending3/ending4