Features:
Drill chuck wrench for electric drill clamping tool.
Use for controlling tightness of looseness of electric drill clamping tool.
Can be used in hammer or drilling mode,very durable, comfortable to grip.

Note:
Do not subject chuck key handles to hammer or other impact blows.
As long as the dimensions are right, you don't need to use too much force to tighten the drill chuck. Otherwise, the gear may be damaged.

Specifications:
Item color: black   
       Chuck Diameter   Teeth Quantity    Outer Diameter of Gear   Salient Point                Net Weight
001     20mm                11pcs                        25mm                                  9mm                  approx 111
002     10mm                 11pcs                       12.5mm                              6mm                    approx 21g
003     13mm                12pcs                       17.5mm                                6mm                   approx 34g 
004     16mm                11pcs                      21.5mm                                8mm                     approx 63g

Package Included:
4pcs/set Drill Chuck Key