Abstract: A level includes a display screen and a control portion. The display screen has a central area which is located at a center of a cruciform of two groups of horizontal display units and two groups vertical display units. A plurality of display bars are located on two sides of each group of horizontal units and arrow-head-shaped horizontal indications are located at two respective remote ends away from the central area of the horizontal display units. The display screen includes a memory area (Memory), an alarm set area (SP), a calibration area (CAL), a resolution area (Resol), a pitching area (Pitch), and a rolling area (Roll). The control portion includes a mode button (MODE), a reset button (MEMO/SET), a calibration button (CAL) and an alarm set button (SP).

Abstract: A suction device includes a handle (10) and an operation lever (30) which has a cam end (32) pivotably connected to the handle. A suction disk (20) has a shaft (21) which movably extends through the underside of the handle and is pivotably connected to the cam end. A release device (40) is connected to a side of the handle and removably engaged with a hole in a side of the operation lever and the handle. The release device can be easily operated by the thumb of the user to disengage the shaft from the operation lever, and the suction disk is pushed back by a spring (22) mounted to the shaft.

Abstract: A suction device includes a handle (10) and an operation lever (30) which has a cam end (32) pivotably connected to the handle. A suction disk (20) has a shaft (21) which movably extends through the underside of the handle and is pivotably connected to the cam end. A release device (40) is connected to a side of the handle and removably engaged with a hole in a side of the operation lever and the handle. The release device can be easily operated by the thumb of the user to disengage the shaft from the operation lever, and the suction disk is pushed back by a spring (22) mounted to the shaft.

Abstract: A smoother includes a plate with a neck connected to an end of the plate and a handle is connected to the neck. A friction sleeve is mounted to the neck so that the user may snap the friction sleeve by his or her index finger and thumb to operate the smoother. The friction sleeve can be added to the existed smoother without too much amendment.

Abstract: A suction device includes a handle and an operation lever which has a cam end pivotably connected to the handle. A suction disk has a shaft which movably extends through the underside of the handle and is pivotably connected to the cam end. A release device is connected to a side of the handle and has an insertion which extends through the handle and is removably engaged with a hole in a side of the operation lever. The release device can be easily operated by the thumb of the user to disengage the shaft from the operation lever, and the suction disk is pushed back by a spring mounted to the shaft.