Flare nut design for better grip without slipping Crowfoot wrenches work in tight spaces where ordinary sockets and wrenches cannot Chrome vanadium steel for strength and durability Fully polished chrome finish for easy clean up Limited lifetime warranty against defects in workmanship and materials Set Includes: PLT-99321 – 10mm PLT-99322 – 11mm PLT-99323 – 12mm PLT-99324 – 13mm PLT-99325 – 14mm PLT-99326 – 15mm PLT-99327 – 16mm PLT-99328 – 17mm PLT-99329 – 18mm PLT-99330 – 19mm .