FUTURO PLUS KEYLESS CHUCK S2M 13 MM, 1/2? ; REVERSIBLESpecially developed for impact drillsSturdy design with metal sleeve. Version 636619000 with hardened carbide jawsDouble sleeve with radial locking for secure tool clampingKeyless for quick tool changeImpact-proof designDrills through using locking screw for clockwise and anti-clockwise operating machinesWith spanner flat for assembly and disassembly