Check the listing for details. GRAINGER APPROVED SF2016FH Drill Bushing,Type SF,Drill Size # 17 11R943. Condition: New. Listed at 23.67 USD. Slip-Fixed/Renewable Drill Bushing (SF), Standard Wall, Headed, Wire, #17 Wire size slip-fixed/renewable (SF) drill bushings come in standard sizes that correspond to American Wire Gauge (AWG) sizes. The larger the wire size, the smaller the bushing. Standard-wall slip-fixed drill bushings have thicker walls and are typically sturdier than thin-wall slip-fixed drill bushings.Slip-fixed/renewable (SF) drill bushings, also known as removable drill bushings, can be removed and replaced when worn. They are ideal for applications where bushings need to be changed between tasks or where bushings are expected to wear out before the job is done. Drill bushings are installed into a drilling jig to guide, support, and position a drill or other cutting tool during metalworking tasks. They keep the cu.