Saburrtooth Taper 1/8" Shank (3.17mm)
18T18-40 Taper Fine Yellow Head Size 1/8"dia (3.17mm) 7/8" Long (22mm)
18T18-50 Taper Course Green Head Size 1/8"dia 7/8" Long
18T14-40 Taper Yellow Fine Head Size 1/4"dia(6.35mm) 1/2" (12.7mm) Long
18T14-50 Taper Green Course Head Size 1/4"dia 1/2" Long