This is a generic AT PLCC44-DIP40 device conversion adapter. 

It can be used on: ATMEL89/MCS51-AVR adaptor of Willem programmer;

16 bit EPROM adaptor of Willem programmer;

It also works with other series programmer such as:

TOP852/TOP853/TOP2003/TOP2004/TOP2005/TOP48/TOP2048/EasyPro80B.

And all other programmers which programs 40 pin DIP devices. 

It also can be used on other equipment other than programmer.

Such as AT-51 Advanced Experimental Board / Atmel AT89XXX programmer. 

Device supported:

AT89X51 PLCC device Socket Conversion such as:

AT89C51, AT89C52, AT89C53, AT89S51, AT89S52, AT89S53 and other 8051 series PLCC44 to DIP40 chip conversion. 
16 bit EPROM PLCC44 chip conversion, such as:

27C1024, 27C2048, 27C2002, 27C4096,27C4002, 27C202, 27C210, 27C220,27C240 etc.