The Nail Titanium extends the success of the Nail by using the most popular polished coverstock, thus far, in Hammer s history! By adding a Pearl version of the Taboo Jet Black"s coverstock and a 4000 grit polish, the Nail Titanium will give the bowler a little more backend than the Smoke and Fire. Coverstock: GTRIII Pearl. 4 Stage Surface Finishing Process: 800 Abranet, 1000 Abralon, 2000 Abralon, 4000 Abralon with Powerhouse Factory Finish Polish. Lane Conditions: Medium Oil. 12# RG 2. 60 Diff . 055. 13# RG 2. 53 Diff . 038. 14# RG 2. 55 Diff . 042. 15# RG 2. 55 Diff . 046. 16# RG 2. 54 Diff . 039.