1.size:3/8"(10mm),1/2"(13mm),5/8"(16mm) 2.keyless,key type drill chuck 3.light, ... box,blister(2,3ps) Professional High Quality of various drill chuck, keyless, key-type, self-lock upon different ... with threaded mounted:10mm, 13mm, 16mm-Key-type drill chuck light duty with taper mounted: 10mm, 16mm- ... type chuck: 10mm, 13mm, 16mm, 20mm-Key-type drill chuck with anti-dust function: 13mm, 16mm-Keyless ...