A system comprising: a power tool including a first housing (60, 76) defining a first opening, a motor positioned within the first housing, a drive mechanism positioned within the first housing and mechanically coupled to the motor, the motor operable to drive the drive mechanism, and a first battery terminal supported by the first housing and positioned within the first opening; a non-motorized sensing tool (88; 160; 224; 284) including a second housing (92, 116; 164, 188; 228, 252; 288, 304) defining a second opening (120, 121; 190, 192; 254, 256), a printed circuit board (104; 180; 244; 296) positioned within the second housing, a sensing element (140; 172, 176; 232; 292) positioned within the second housing and electrically coupled to the printed circuit board, the sensing element operable to detect an external characteristic and output a signal indicative of the detected characteristic to the printed circuit board, the printed circuit board operable to condition the signal into a human-comprehensible form, a display (108; 184; 248; 300) electrically coupled to the printed circuit board, wherein the display receives the conditioned signal from the printed circuit board and displays an image indicative of the external characteristic, and a second battery terminal supported by the second housing and positioned within the second opening; and a rechargeable battery pack removably and independently couplable to the power tool and the non-motorized sensing tool, the battery pack configured to communicatively connect to the power tool when coupled to the power tool and communicatively connect to the non-motorized sensing tool when coupled to the non-motorized sensing tool, a portion (24, 36) of the battery pack being insertable into the first opening of the power tool to engage the first battery terminal and enclose the first opening, the portion (24, 36) of the battery pack being insertable into the second opening of the non-motorized sensing tool to engage the second battery terminal and enclose the second opening, the first battery terminal and the second battery terminal being generally exposed when the portion (24, 36) of the battery pack is removed from the first opening and the second opening, respectively. a power tool including a first housing (60, 76) defining a first opening, a motor positioned within the first housing, a drive mechanism positioned within the first housing and mechanically coupled to the motor, the motor operable to drive the drive mechanism, and a first battery terminal supported by the first housing and positioned within the first opening; a non-motorized sensing tool (88; 160; 224; 284) including a second housing (92, 116; 164, 188; 228, 252; 288, 304) defining a second opening (120, 121; 190, 192; 254, 256), a printed circuit board (104; 180; 244; 296) positioned within the second housing, a sensing element (140; 172, 176; 232; 292) positioned within the second housing and electrically coupled to the printed circuit board, the sensing element operable to detect an external characteristic and output a signal indicative of the detected characteristic to the printed circuit board, the printed circuit board operable to condition the signal into a human-comprehensible form, a display (108; 184; 248; 300) electrically coupled to the printed circuit board, wherein the display receives the conditioned signal from the printed circuit board and displays an image indicative of the external characteristic, and a second battery terminal supported by the second housing and positioned within the second opening; and a rechargeable battery pack removably and independently couplable to the power tool and the non-motorized sensing tool, the battery pack configured to communicatively connect to the power tool when coupled to the power tool and communicatively connect to the non-motorized sensing tool when coupled to the non-motorized sensing tool, a portion (24, 36) of the battery pack being insertable into the first opening of the power tool to engage the first battery terminal and enclose the first opening, the portion (24, 36) of the battery pack being insertable into the second opening of the non-motorized sensing tool to engage the second battery terminal and enclose the second opening, the first battery terminal and the second battery terminal being generally exposed when the portion (24, 36) of the battery pack is removed from the first opening and the second opening, respectively.