The sleeves are wide at the base (3.5 cm) and easy to clean. Not a wide variety of forms, but a variety of sizes especially: the carton contains a dozen plain sleeves (not grooved) of 1 to 15mm. A fluted ten (star) from 3 to 12 mm, more a socket log ... Just missing, for one socket in Saint-Honoré. I turned the carton, fragile and too big.