The slim right angle has a long shaft ending in a slim unguarded right angle. 
This attachment connects to the Quick Connect in the left or right horizontal position. 
It accepts the guarded chamfer burr which is used to float sharp enamel points off the upper and lower arcades.
It can also accept the popular apple core burr for excellent access to the caudal buccal edges in minis. 
It can also accept the slimline diastema burr for performing occlusal relief grooves.