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