The pre-installed spot lens provides a tighter pattern to pierce into zone 4 for higher speed runs
includes 1" grade 8 knuckle tie in bolt
but in the words of Bob Fox
2001-2016 Chevrolet Silverado 2500/3500 Duramax Diesel
Rigging screw with ball Size:-48 The pre-installed spot lens providesRIGGING SCREW WITH BALL F R W M ROD ART. NO. ROD DASH ROD R D1 D2 D3 L (MIN) L (MAX) KW1 KW2 KW3 RTB017 17 8,4 14,8 29,5 27,5 31 235 354 21 10,5 14,5 RTB022 22 9,5 15,8 31,5 31 37 248 373 24 12 18 RTB030 30 11,1 17,8 35,5 36 39 265 401 28 13 20 RTB040 40 12,7 19,8 40 40 43 288 434 30 15 22 RTB048 48 14,3 21,8 44 44 46 308 459 33,5 17 24 RTB060 60 16,8 24,8 50 48 52 314 456 36 19 26