Accessory tool

An accessory tool comprising:

• a first end having a maximum outer diameter;
• and
• a shank coupled to the first end, the shank including
• a second end including a cross section having a maximum outer width,
• a first reduced portion disposed between the first end and the second end, the first reduced portion having a first minimum outer diameter and a first length, and
• a second reduced portion formed in the second end between the first reduced portion and an end of the shank, the second reduced portion configured to be engaged by a tool to secure the shank to the tool, the second reduced portion having a second minimum outer diameter and a second length,
• wherein the maximum outer diameter is greater than the maximum outer width, wherein the maximum outer width is greater than the first minimum outer diameter and greater the second minimum outer diameter, wherein the shank defines a third length, and wherein the first length is 10% to 45% of the third length.

A shank for an accessory tool, the shank comprising:

• a tool engagement portion including a cross section having a maximum outer width;
• a first reduced portion adjacent the tool engagement portion, the first reduced portion having a first minimum outer diameter and a first length;
• a second reduced portion formed in the tool engagement portion between the first reduced portion and an end of the shank, the second reduced portion configured to be engaged by a tool to secure the shank to the tool, the second reduced portion having a second minimum outer diameter and a second length;
• and
• a flange positioned on an opposite side of the first reduced portion from the tool engagement portion and configured to be coupled to an effector end of the accessory tool, the flange having a maximum outer diameter,
• wherein the maximum outer width of the tool engagement portion is greater than the first minimum outer diameter, greater than the second minimum outer diameter, and less than the maximum outer diameter, and wherein the first length is greater than the second length.