Gkhowiu 4 Pcs Quick Change Chuck Multifunction Universal Keyless Drill Chuck for Electric Grinder 0.4-3.2mm

2. SIMPLE TO : Chuck allows quick and easy accessory changes without changing collets 1. METAL MATERIAL: All-metal Keyless Chuck, three- and are heat treated at high temperatures for durability 3. WIDE RANGE OF APPLICATIONS:Applicable to FOR 9/32-40 thread, inner direct 6.2mm is 4000, 400,3000, 398, 395, 300, 285, 275, 200, 100, 8200, 800, 780 , 770, 7700, 750 4. NOTE:8050-18 can not be , the thread can be matched, the machine shaft is too short.