Abstract: A device and method for injecting a blade onto a surgical instrument and extracting a blade from a surgical instrument. The injector includes a housing having an elongated cavity for receiving the instrument head. Prior to injection, a blade is retained in the cavity. To inject a blade, a user inserts the instrument head into the channel. The rim of the blade aperture engages the groove on the tang as the instrument is inserted. When the tang is fully engaged with blade, the user can withdraw the instrument with the blade mounted on it. The extractor includes a housing having an elongated cavity for receiving the instrument head. The channel has a slot that extends through the housing. A spring catch is mounted in the cavity on a side wall opposite the spring clip. To extract a blade, a user inserts the instrument head into the channel until the spring catch engages the proximal end of the blade.

Abstract: A body having a handle portion and a frame portion. The frame portion has an opening with one or more channels, which may be defined by adjoining walls, grooves or paired protuberances, for cradling the cue. A player braces the handle portion against the table and inserts the cue through the opening with the cue cradled in a channel. A slide having a slide channel may be disposed in the opening of the frame. A resilient member, such as a rubber O-ring, spans the frame and is connected to the slide. The player inserts the cue between the slide and the frame channel. The resilient member biases the slide channel against the cue, which, in turn, bears against the frame channel. The cue is thus captivated between the slide channel and the frame channel while the player makes a shot.