Made of high quality aluminum bar stock. Light weight design. Three styles - Regular Code, Turbo type, & APC type Regular Cone & Turbo type blades with 8mm hub & 3mm hole, Multiple collets for different motor shafts included P/N Dia. fits Shaft Dia. PFC18 1/8", 3.17mm collet for all PT, PK, & PA spinners except PT50, PK50 and PA50 PFC2 2.0mm collet for all PT, PK, & PA spinners except PT50, PK50 and PA50 PFC23 2.3mm collet for all PT, PK, & PA spinners except PT50, PK50 and PA50 PFC3 3mm collet for all PT, PK, & PA spinners except PT50, PK50 and PA50 PFC4 4mm collet for all PT, PK, & PA spinners except PT50, PK50 and PA50 PFC5 5mm collet for all PT, PK, & PA spinners except PT50, PK50 and PA50 PFC54 4mm collet for PT50, PK50, PA50, PT55, PK55 and PA55 PFC55 5mm collet for PT50, PK50, PA50, PT55, PK55 and PA55 PFC56 6mm collet for PT50, PK50, PA50, PT55, PK55 and PA55