... Specification:1,name: mechanical ratchet wrench 1/2'',3/8'',1/4''dr hand tools 2, size: 1/2'',3/8'',1/4''24 teeth and 1/2'',3/8'',1/4 ... →vibration grinding,polishing,electroplating→dimension inspection →hardness test→tension test,torque test profileVerification Type:third- Date of Issue:2006-03-27Business ...