speed hole                
                                
                                          
 turn your walkman  like a turtle.  there 
 might  be  something  there  that  looks 
 like  a screw hole but  it  could  be  a 
               speed hole.                
 the   rule  is   if  you  can't  get   a 
  reasonably small screwdriver in there,  
          it's not a screw hole.          
                                          
                  usage                 
                                          
 use  the  speed hole  like a screw  hole 
      but with a tinier screwdriver       
                                          
                  this                  
                adjusts                 
                   the                  
                 pitch                
                                          
 some cassette players  have speed screws 
 but no  holes for  them. to get to those 
 screws  you  need   to  dissasemble  the 
 whole   thing.   could   be   worth   it