9 piece, bi-metal hole saw kit, designed for plumbers, includes: 3/4", 7/8" 1-1/8", 1-3/8", 2", 2-1/2" hole saws, 2l & 5l arbors, 5l arbor adaptor. Kits are more durable, metal pin hinge won't break or tear, lockable standard padlocks can be used to secure kit contents, secure metal latches close case tightly & securely.