ZEBRA POWERDRIV® (12-Point) Double Box End Ratchet Wrench 4-In-1 - 10mm x 13mm + 17mm x 19mmZEBRA POWERDRIV (12 Point) Double Box End Ratchet Wrench 4 In 1 10mm x 13mm + 17mm x 19mm 4 sizes in one ratchet wrench Most common wrench sizes are covered by only 2 ratchet wrenches. 1 4" bit adapter compatible Simply insert adapter into size 10 mm ratchet wrench to use as a bit ratchet. For hard to access areas Narrow ratchet head Metric, straight Output: Double ratcheting box end POWERDRIV (12 Point) Finely toothed, 72 teeth Single handed