Industry First Semi-Deep Impact Universal Sets - Semi-Deep Sockets are for use in Applications Where a Standard Socket is too Short & a Deep is too Long A New Re-Designed Chamfered Drive Means Easy Attachment To Power Tool Anvils while Also Protecting Them From Damage The Blow Mold Transfer/Storage Case Also Doubles As A Compact Tool box organizer When Handle Is Removed Includes Sizes 10,11,12,13,14,15,16,17,18 & 19MM