Also known as a strap duplicator.
Manufactured from high grade spring steel.
Used to locate a hidden hole and has a through hole that aligns with the hidden pilot hole, this ensures that once drilled, the holes are aligned.
The 5 piece set includes one each of the following 8-1/2″ hole finders:
No40 (part no 100970)
No30 (part no 100971)
No21 (part no 100972)
No10 (part no 100973)
1/4″ (part no 100974)