Teng Tools ID515 1/2" DRIVE HEAVY DUTY IMPACT SET SCREWDRIVER 15 PCS 72660103
"Teng Tools" Set of 15 pieces. Reversible action. Driver designed with 1/2" drive, but is also equipped with a chuck in which bits with 5/16" drive can be fitted. With adaptor 5/16"-3/8", chuck 1/2"-5/16" and 12 different bits.