The kit you are looking at is from the original owner, these tools were used in the aerospace industrial complex. The threaded 90 can hold 1/4-28 threaded drill bits at 2750 rpm. Overall length is 9 inches. The straight drill runs at 1000 rpm and has a new Rohm chuck at 0-1/4 in. This is consider a palm drill at 6” measuring at the top of the drill motor. Both of these drills has a swivel male air fitting for a more ergonomic feel when using them. Thanks for looking. God Bless. aircraft tools. Shipped with USPS First Class.