1/4 Sq. Dr. Socket Set Z-series 26 pieces – Ko-ken USA
KOKEN ZEAL 1/2" SOCKET WRENCH SET (21 PIECES) w/Metal Case 4285Z MADE IN JAPAN | eBay
NTD Koken Zeal 1/4 set. The chrome socket in the middle is a 10mm Williams (Taiwan) the socket to the left is the Koken 10mm. Crazy difference in height between the tool.
KO-KEN Z-EAL 1/2SQ Socket Set 10pc - Amazon.com
Koken RS2400MZ/12 Zeal 6.35mm Socket Set with Rail Review
Ko-Ken RS3400MZ/12 3/8" Z-series or Zeal Socket Set First Look (Koken) - YouTube