The snappy system starts with the quick chuck. This is fitted into a standard 3/8 inch key or keyless chuck. Six flats on the shank ensure precise location in the chuck. A sprung loaded outer sleeve makes it easy to remove attachments. Can be fitted to the quick chuck or directly into drill chuck. specification:. Overall length=6 inch. Head diameter= (18mm). alternatives::. Trend snappy quick chuck long 3 tr_snap/qc 3. Trend snappy quick chuck only tr_snap/qc. Trend snappy quick chuck magnetic 2 tr_snap/qcm. accessories::. Trend snappy 7 pc imperial drill set tr_snap/d/set. Trend snappy 5 pc countersink set tr_snap/cs/set. Trend snappy screwdriver bit set 2 31 pcs tr_snap/sb 2/set. Trend snappy drill bit guide 4pc set tr_snap/dbg/set.