Insertion of small cannulated cancellous bone screws. A, After reduction of fragments, 1.25-mm threaded guide is inserted using small air drill and drill sleeve. Guidewire should cross fracture and penetrate far cortex. Guidewire position is confirmed with radiographs in three views, drill sleeve is removed, and second wire is inserted parallel to first wire. B, Guidewire insertion depth is determined by direct measuring device over wire; drilling depth is 5 mm less than reading on device to prevent penetration of far cortex. C, Cannulated drill bit is inserted into drill guide until coupling rests on guide. Drill is inserted into measuring device, knurled nut is loosened, drill guide is rotated until drill bit length corresponds to drilling depth, and nut is tightened. Drilling assembly is placed over guidewire, and drilling continues until coupling end contacts drill guide. D, Small cannulated countersink is placed over guidewire to create recess for screw head (a washer can be used if necessary). E, Near cortex is tapped using tapping assembly. F, Small cannulated bone screw of same length as depth drilled is inserted over guidewire. Guidewire is removed. Procedure is repeated for additional screws.