In addition, only a forward lower face (46a) of a head portion of the clamp screw (52) engages a top surface (22a) of the clamp (40).

An opening (72a, 68a) into the socket affords access to the recessed clamping bolt head.

In either case, by relieving the applied torque or removing the tool from the locking screw head results in the locking screw expanding within bore and assuming an interference or locked fit within the bore.

The head being slippery, and the ears being furry.

The locking screw is compressed by engaging the head (12a) thereof with the tool (16).

Further tightening of the setscrew then locks the bone screw and rod together.

When mounted to the head body, the fixing nut holds the screw.

A metal cutting insert is clamped to the cutter support head by a clamp that is secured by a clamp screw being threaded into the clamp screw passage.

The head is provided with a head body (21) and a fixing nut (22) which fixes the screw disposed at a screw disposing section (211) of the head body to the head.

The screw head (58) of the clamping screw (34) rests against a face (60) of the replaceable cutter head (12).

Tightening of the clamping screw within the clamping screw orifice removably joins the barrel to the barrel housing.

The mouthpiece contains a bearing ring (11) for supporting the head (13) of the tightening screw (12).

The free end of the driving mandrel (14) can be secured against rotation to the head (13) of the exchangeable tightening screw (12).

A metal locking tie tool (92) secures the strap to the locking head by displacing a portion of the strap in the locking head.

Then, note the presence of a clamping screw for the tilting head, quite compact and easy to manipulate, here again.