Stainless Steel Chuck Stainless Steel Bearing Type Stainless Steel Mounting Type 1JT Key Number K1M Closed Length 1.92 In. Open Length 1.54 In. Chuck Diameter 1.12 In. Capacity Max 0.250 In. Capacity Min 0.028 In. Construction Steel Application Portable Drills or Stationary Machine Tools For Use With K1M Chuck Key Includes Chuck Key