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