MaterialSteelPurposeTo install countersink rivbolt and BACN10RB-3 and SL52-3 self locking nut. Initial use job #65B57765-813. Used with hex drive air ratchet.ActuationAir ratchetBit TypeSlottedUsed OnCountersink rivbolt, BACN10RB-3, SL52-3Used WithHex drive air ratchet 