LAB NSL108 Best IC Core Lock Rekeying Kit. For Best A2 systems including: Arrow IC, Falcon, Schlage SFIC and Medeco Keymark. Heavy Duty steel case with Hardcoat finish and leakproof seal tight cover. Kit includes: 0A thru 9A nickel silver bottom pins, 2B thru 19B brass master pins, 2 styles caps: machined and stamped, spring covers for 6 & 7 pin cylinders and 2 different cylinder springs: long & short. Case measures: 11 1/4" x 8 1/2" x 1 7/8". Refills are available.