stacked configuration and evenly spaced at relatively small increments to facilitate a high degree of distance adjustability d 1 dn between the blade 34 not shown and the guiding surfaces 32 a and 32 b as can be demonstrated in fig1 a the purposefully designed exposure of the entire sharp edge 34 b of blade 34 allows the user to skillfully manipulate the depth that the blade 34 penetrates sheet material 44 this on the fly adjustability allows the user to utilize the entire sharp edge 34 b of blade 34 while performing a cutting operation enabling the use of a sharper less used portion of blade edge 34 b if difficulties due to dulling of a particular area of blade edge 34 b are encountered during a cutting operation another feature demonstrated in fig1 b is how the purposefully designed rounded receptacle end 14 of blade holder 1 along with the exposure of the entire sharp edge 34 b of blade 34 allows the user to greatly vary the angle of attack of blade 34 without interference that would be encountered with a square ended trimmer when severing sheet material 44 this feature is especially important when structure surface 40 a is short or shallow as shown in fig1 b allowing only the small end portion of guiding surface 32 a or 32 b to be utilized during a cutting operation this ability to vary the angle of attack of blade 34 also allows the user to precisely trim into corners and around obstacles in circumstances such as illustrated in fig1 b in both circumstances illustrated in fig1 a and 10b the ability to utilize the entire sharp edge 34 b greatly increases the usable life of blade 34 compared to trimmer tools that only.