A depth gauge device including a body extending a central longitudinal axis and including a channel and a light-passing hole, the light passing hole open to the channel, a light source mounted in the body for generating a light beam, the light beam passing through the light-passing hole toward a surface of a drill-bit extending through the channel, the light beam forming an incident light beam when reflected away from the drill-bit surface, an image sensor mounted in the body for sensing the incident light beam and generating a plurality of successive images of the drill-bit surface to detect variations in the position of the drill-bit moving through the channel and an clamp coupled to the body, the clamp including a plurality of adjustable arms configured to clamp the device to a protection sleeve.

A depth gauge device including a body extending a central longitudinal axis and including a channel and a light-passing hole, the light passing hole open to the channel, a light source mounted in the body for generating a light beam, the light beam passing through the light-passing hole toward a surface of a drill-bit extending through the channel, the light beam forming an incident light beam when reflected away from the drill-bit surface, an image sensor mounted in the body for sensing the incident light beam and generating a plurality of successive images of the drill-bit surface to detect variations in the position of the drill-bit moving through the channel and an clamp coupled to the body, the clamp including a plurality of adjustable arms configured to clamp the device to a protection sleeve.

An assembly includes a surgical device (10) including a distal interface member (12) and a proximal handle (14), the distal interface member (12) including a connecting element (16) for connecting to a surgical tool (18), and a K-wire (20) that passes through a central passageway of the surgical device (10) distally through the distal interface member (12) into a lumen of the surgical tool (18). A wire depth measurement tool (30) includes a handle interface member (32) that assembles to the handle (14) and one or more graduated scales (36) that extend proximally from the handle interface member (32). The graduated scales (36) include depth graduations for indicating an amount a tip of the K-wire (20) protrudes from a distal end of the surgical tool (18).