Blue Aluminum Handle Ball Bearing Practice Butterfly Trainer - Tophatter's Guns'N'Weapons Store - FREE SHIPPINGHigh Quality Blue Aluminum handle Practice Butterfly Trainer, provides sufficient grip friction and soft hand feeling, reduces the possibility of falling and damage, and maintains a good flip experience for a long time. Smooth ball bearing action. Specifications: 5. 25 Inch closed in length 9 Inch open position length 4 Inch 3MM Thick 440C black finish stainless steel trainer blade Features: Ball bearing butterfly knife Aluminum steel handle