| http://www.w3.org/ns/prov#value | - Centrally within both the tool carrier 77 and the shaft 62 are coaxial openings 98 and 99 which receive the wire, or other tool, indicated by the broken line W. The dimensioning of the balls 91 and 92 and of the disk 93 as best illustrated in FIGS. 2 and 3 is such that when the tool carrier 77 is urged leftwardly by the spring 81, said disk and balls will bear against the surface 69 and be urged t
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