Lock and Release Power Drive Shanks for Power Drive Caps

The Power Drive Shank is used with machines that accept hex shanks and pairs with our Power Drive Cap when installing machine drive sign posts. To properly determine the correct shark size, you need 2 measurements: (A) hex diameter across two opposite flats and (B) hex length, from locking collar to top of hex. NOTE: to use this shank, you must also purchase a drive cap.