AERO SAF-T-BLOK STANDARD

Helps thousands of mechanics by taking the headaches and hassle out of drilling safety wire holes in bolts and nuts. Easy to use; Saf-T-blok holds the bolt steady after you thread it in to the required depth. You then drill the hole through the center with no risk of misalignment. Saf-T-Blok is available in 4 sizes:   Size Part No. Part No. Part No. Standard:  1/4-5/16-3/8 USS & SAE 12-15345 $28.70 Metric:  6x1, 8x10, 8x1.25, 10x1.25, 10x1.5 12-15346 $28.80 Aero: 8-32,10-32, .25x20, .25x28, 5/16 x 24 12-15347 $28.70 Allen:  #8,10,1/4,5/16,3/8 12-15348 $28.70