PSI Woodworking LXPMSET Ultra Carbide Chisel System One handle works for 3 included cutter profiles: 2" Radius, 3/8" Round, Detail Diamond System includes: handle, 3 cutter profiles, 3 cutter carriers, magnetic chip deflector, Allen wrench, durable nylon carrying pouch Ultra sharp carbide cutters have numbered edges for reliable rotation Flat bottom handle blade ensures straight, level cut along tool rest To change applications, simply replace the cutter in the handle