The Snap-On 3/8 Short Impact Sockets Set IMFM includes a range of sockets from 8mm to 24mm, Please not the 8mm is not a snap on socket!!! And the 10 & 11 mm socket are replacements snap on Genuine IMFM 8mm not snap on 9mm IMFM 10mm IMFM 11mm IMFM 12mm IMFM 13mm IMFM 14mm IMFM 15mm IMFM 16mm IMFM 17mm IMFM 18mm IMFM 19mm IMFM 21mm IMFM 24mm IMFM.