1/4" (6.35mm) or Tire Repair Carbide WIRE Cutter Choose the proper carbide cutter and plug stem based on puncture injury size. To remove excess rubber and smooth jagged steel wire in repair areas. Use with low speed tool. 1/4" (6.35mm) Shank has 3 flat side to prevent slippery. | 1/4" (6.35mm) diameter, 3-1/4” or 80 mm long US-BASED CUSTOMER SERVICE: Available by chat, email, phone, or visit us at our customer service center in La Crosse, WI.