FUTURO PLUS KEYLESS CHUCK S1M 13 MM, 1/2? ; REVERSIBLE FOR SPINDLE LOCK MACHINESSpecial design for impact drills with spindle stopSturdy design with metal sleeveSingle sleeve (without supporting ring)Keyless for quick tool changeImpact-proof designDrills through using locking screw for clockwise and anti-clockwise operating machinesWith spanner flat for assembly and disassembly