A hunk of 2-in. thick plastic foam makes a great permanent headquarters for router bits and collet wrenches. To drill the shank holes with crisp edges, run your drill or drill press at high speed while pushing down with light pressure. For snug-ﬁtting bits, use a 3/16-in. drill bit for 1/4-in. dia. router bits, and a 7/16-in. bit for 1/2-in. dia. router bits. To cut grooves for the wrenches, use your table saw with the blade raised 1/2 to 3/4 in. above the table. You can cut the plastic foam just the right size to ﬁt in a drawer, cabinet or tool chest.