Abstract: A blade quick removal device includes an arcuate frame integrated with a front handle and a rear handle, a first hook bar under the front handle, an oscillatory second hook bar nearby the rear handle for adjustably retaining the saw blade thereon and a locking member pivoted to the lower end of the second hook bar for fastening the hook bar to a reduced bottom of the rear handle and having an axial rod and a pair of latches respectively held by a hook and a pair of retaining projections on the bottom of the rear handle.

Abstract: A self-opening handle for a heavy duty artistic knife includes a handle which is combined with a pair of corresponding halves and rotatably connected on their rear ends, a blade rack slidably disposed in the front portion, a blade chamber formed in the rear portion and a swivel lock locking the lower middle portion thereof. The feature is that a magnet disposes in a lower inner wall of each of the corresponding halves with the identical pole toward each other so that when the swivel lock is at a unlocking position, the pair of corresponding halves will automatically open a large angle due to the expelling force of the magnets. Therefore providing a convenient and swift changing of the blade from the blade rack.

Abstract: A structure of handle for mini-handsaw includes a handle having a gap to engage a saw blade therein, a slider in cooperation with a locking member slidably engaged within a rectangular opening of the handle for releasably gripping the inner end of the blade and a swivel arrester fastening the middle portion of the blade through a slot and a depression of the handle. This handle is characterized in a convenient embedment or disengagement of the saw blade and the engagement is very stable.

Abstract: A heavy duty artistic knife combined with a lamp including a housing combined with a first and second halves hinged together at their corresponding rear ends and locked up at their medial portion by a lock, the first half has a blade chamber for receiving spare blades, a battery chamber for receiving a pair of batteries and plurality of conductible plates which connect between the batteries and a pair lead-in wires from a lamp inside the front end of the housing. The lamp is operated by a blade assembly which is slidably moved as a switch to emit or to turn out the lamp. Except metallic material, the housing con be made of any rigid materials.