Bondhus 4MM Tamper Resistant Hex Key

Bondhus Tamper Resistant Long Hex Key; 4MM; This type L wrench fits hex socket screws with a pin or post in the center of the hex recess. These screws are often refered to as Tamper Resistant, Tamper Proof, or Security Hex Screws. These tools have a small hole in the center of BOTH LONG and SHORT ENDS to provide increased flexibility for the user. This feature is not always found on competitors' wrenches.