Jacobs® 3651D Chuck Key, 5/16 in Pilot, K3 Key Number, Steel
Item #BC003187

Jacobs® Chuck Key, 5/16 in Pilot Dia, Key Number: K3, Steel
  • Nickel thumb grip styles increase leverage and user comfort
  • Soft steel handles limit the potential for dangerous fracturing under excessive load
  • Self-ejecting models with spring loaded ejectors ensure key disengagement after tightening
  • Never apply extensions, pliers, wrenches or cheaters of any kind to chuck key handles
  • Do not subject chuck key handles to hammer or other impact blows
  • Thumb handle
MaterialSteel
Key NumberK3
Pilot Diameter5/16 in