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. specification:. To fit a standard 3/8 inch key or keyless chuck. alternatives::. Trend snappy quick chuck magnetic 2 tr_snap/qcm. Trend snappy quick chuck rubberised grip tr_snap/qcr. Trend snappy quick chuck long 3 tr_snap/qc 3. Trend snappy quick chuck ex-long 6 tr_snap/qc 6. 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.