12 PIECES - Combination Spanner Ratchet Wrench Kit 8mm to 19mm 72-Tooth ratchet gear: only needs 5 degree working swing arc. 180° Flex Head: easily get around obstructions. Combination: 12 points box end and open. Made from heat-treated chrome vanadium steel. drop-forged, hardness reaches HRC 48. Mirror finishing in high-polish chrome, anti-corosion and rust-resistance. Available and in stock