The trimmed block is then sent up to the second floor on a conveyor belt where it goes into a hopper in front of the threading machine. A worker then takes the shaped block and clamps it into the threading machine. This machine spins the shaped block and the operator rotates a cutting tool with a cutting head on it, sort of like a wood carvers V-shaped carving tool bit, down onto the spinning block. The angle of attack of the tool is such that as the tool bit cuts a gouge in the wood it is forced down the trimmed shank of the block resulting in a screw thread being cut in the shank of the block. The operator then stops the spinning piece, unclamps it, reverses ends, reclamps it and threads the other end. Once he has threaded both ends he stacks the pieces in a hopper table.