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