A handy Metric or English convertable depth gauge. The set consists of one head and one stainless steel rule; one side metric, the other English. It can be easily slipped and locked in to the slot. The rules can be used separately, if desired. Metric graduations in 1/2 millimetres; English in 64ths. Each set individually packed in PVC covers. Also engraved are the 15^o , 30^o, 45^o angle.