Just twist the nut and each reamer expands to the smallest size of the next larger size
All reamers marked with sizes
Constructed of hardened and precision ground tool steel
Capacity 1/2 in. - 1-1/2 in.
Product Length 1/2 in. - 1-1/2 in.
Shipping Weight 12.90 lbs.
Accessories Included .468"-.530", .530''-.593'', .593''-.655'', .655''-.718'', .718''-.780'', .780''-.842'', .842''-.937'', .937''-1.062'', 1.062''-1.187'', 1.187''-1.344'', 1.344''-1.500''.