Keilim 29:8-30:1
Keilim 29:8
The remnant of a hoe’s handle at the low end is considered connected for up to seven handbreadths (about 21”). Beis Shammai say that the handle of a homeowner’s rake is considered connected for up to seven handbreadths, while Beis Hillel say eight handbreadths. Regarding the rake used by plasterers, Beis Shammai say up to nine handbreadths and Beis Hillel say up to ten handbreadths. Anything beyond these lengths is also susceptible to ritual impurity if the owner desires to retain it. The handles of utensils used in fire are susceptible to impurity regardless of their length.
Keilim 30:1
Flat glass utensils are insusceptible to ritual impurity while those that have receptacles are susceptible; if they get broken, they’re purified. If one re-made utensils of them they become susceptible to impurity from that point on. A glass tray and plate are insusceptible to impurity; if they have a rim, they’re susceptible. If one modified the concave bottom of a broken glass bowl or plate for use, they are insusceptible to impurity but if he polished them or smoothed them with a file, then they are susceptible to impurity.