The new airtool mtb is our most dependable durable and big volume frame pump for use in all off road conditions all aluminum shaft handle and chamber for durable performance larger volume body for pushing more air new stainless locking lever head converts to schrader or presta for easy use on all bikes plunger locks to main body chamber with a simple twist overlapping locking handle for compact size and efficiency storage chamber in the handle for patches etc new water bottle boss mounte