INDUSTRIAL BY SPECIALTY PARTS CONT. FEMALE SQUARE DRIVE QUICK CHANGE BIT HOLDER Part Number QR-250BH 1/4 QR-437BH 3/8 QB-MBH 1/2-H QR-BH308-H Square Size 1/4” 3/8” 1/2” 3/8” Bit Size 7/16” 7/16” 7/16” 1/4” Overall Length 2” 2” 2-1/8” 1-3/4” HEX DRIVE EXTENSIONS Part Number 250SH 3/8-B4-H 250SH 3/8-12 250SH 3/8-18-H 375SH 1/2-H Drive Size 1/4” 1/4” 3/8” 3/8” Male Square Overall Length 4” W/BALL 7/16” 12” 7/16” 18” 7/16” 1-1/2” 1/2” FEMALE SQUARE DRIVE EXTENSIONS Part Number 500SH 1/2-2-H 500SH 1/2-6B-H 500SH 1/2-8 500SH 1/2-10-H SH 1/4-3/8-6-H SH 1/4-4B-H SH 1/4-10-H Drive Size Female Square Overall Length 2” 1/2” 1/2” 6” W/BALL 1/2” 1/2” 8” 1/2” 1/2” 10” 1/2” 1/2” 6” 3/8” 1/4” 4” W/BALL 1/4” 1/4” 10” 1/4” 1/4” HEAVY DUTY FASTENING TOOLS 45