Esslinger & Co. has introduced “Perfect Fit” ring guards in 14k gold and rhodium finish. The ring guards feature spring tension that self-adjusts to five sizes, enabling the wearer to switch a ring from finger to finger. The ring guards are sold individually or in an assortment of best sellers. Esslinger & Co., 1165 Medallion Dr., St. Paul, MN 55120; (800) 328-0205.

Production desoldering stations have an Auto-Snap Vac feature to decrease clogging and maximize heater and top life. The systems come standard with SX-70 desoldering handpiece. Model ST 75 has analog control and manual temperature lockout. Model ST 115 offers digital LCD, auto temperature setback, auto tip-offset compensation, and password lockouts. Pace USA, 9893 Brewers Court, Laurel, MD 20723-1990; (301) 490-9680, fax (301) 498-3252.

Pocket-Tech is a pocket scale that weighs in grams, ounces, troy ounces, and pennyweights. It features a built-in hard protective case, 0.1 gram readability, a four-button keypad, battery-saving auto off, and digital auto calibration. It’s available in three capacities: 120 grams, 200 grams, and 300 grams. Gram Precision Scales Inc., 7354 Apsen Ave., Mississauga, Ontario, Canada L5N 6P2; (888) 400-3688, fax (888) 400-2219.

Dendritics’ Gemscale 500, a high-capacity, portable scale, is being introduced at the Tucson gem shows this month. The battery-operated unit has a capacity of 500 cts., 100 grams, and 64 pennyweight. It features dual displays, enabling buyer and seller to see the readout at the same time. The life of the batteries exceeds 1,200 hours. The scale, made in the United States, carries a two-year warranty. Dendritics Inc., 223 Crescent St., Waltham, MA 02154; (800) 437-9993 or (781) 891-3888, fax (781) 893-5334.